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122222011 = 881138731
BaseRepresentation
bin1110100100011…
…11010110111011
322111222112002011
413102033112323
5222242101021
620043350351
73012604252
oct722172673
9274875064
10122222011
1162a9a22a
1234b223b7
131c424422
1412337799
15aae3de1
hex748f5bb

122222011 has 4 divisors (see below), whose sum is σ = 122361624. Its totient is φ = 122082400.

The previous prime is 122221999. The next prime is 122222017. The reversal of 122222011 is 110222221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110222221 = 131841391.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-122222011 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 122221982 and 122222000.

It is not an unprimeable number, because it can be changed into a prime (122222017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68485 + ... + 70246.

It is an arithmetic number, because the mean of its divisors is an integer number (30590406).

Almost surely, 2122222011 is an apocalyptic number.

122222011 is a deficient number, since it is larger than the sum of its proper divisors (139613).

122222011 is an equidigital number, since it uses as much as digits as its factorization.

122222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139612.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 122222011 is about 11055.4064149628. The cubic root of 122222011 is about 496.2682317704.

Adding to 122222011 its reverse (110222221), we get a palindrome (232444232).

The spelling of 122222011 in words is "one hundred twenty-two million, two hundred twenty-two thousand, eleven".

Divisors: 1 881 138731 122222011