122121011 has 4 divisors (see below), whose sum is σ = 122200512. Its totient is φ = 122041512.

The previous prime is 122120987. The next prime is 122121017. The reversal of 122121011 is 110121221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122121011 - 2¹⁴ = 122104627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122120983 and 122121001.

It is not an unprimeable number, because it can be changed into a prime (122121017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37400 + ... + 40533.

It is an arithmetic number, because the mean of its divisors is an integer number (30550128).

Almost surely, 2^122121011 is an apocalyptic number.

122121011 is a deficient number, since it is larger than the sum of its proper divisors (79501).

122121011 is an equidigital number, since it uses as much as digits as its factorization.

122121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79500.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 122121011 is about 11050.8375700668. The cubic root of 122121011 is about 496.1314945220.

Adding to 122121011 its reverse (110121221), we get a palindrome (232242232).

It can be divided in two parts, 1221210 and 11, that added together give a palindrome (1221221).

The spelling of 122121011 in words is "one hundred twenty-two million, one hundred twenty-one thousand, eleven".