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1222000121 = 4129804881
BaseRepresentation
bin100100011010110…
…0011110111111001
310011011102001000202
41020311203313321
510000313000441
6321131411545
742165554366
oct11065436771
93134361022
101222000121
11577872861
122a12b3bb5
131662280c4
14b841946d
157243419b
hex48d63df9

1222000121 has 4 divisors (see below), whose sum is σ = 1251805044. Its totient is φ = 1192195200.

The previous prime is 1222000063. The next prime is 1222000127. The reversal of 1222000121 is 1210002221.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 580087225 + 641912896 = 24085^2 + 25336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1222000121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222000127) 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, 14902400 + ... + 14902481.

It is an arithmetic number, because the mean of its divisors is an integer number (312951261).

Almost surely, 21222000121 is an apocalyptic number.

It is an amenable number.

1222000121 is a deficient number, since it is larger than the sum of its proper divisors (29804923).

1222000121 is an equidigital number, since it uses as much as digits as its factorization.

1222000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29804922.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1222000121 is about 34957.1183165890. The cubic root of 1222000121 is about 1069.1133426848.

Adding to 1222000121 its reverse (1210002221), we get a palindrome (2432002342).

The spelling of 1222000121 in words is "one billion, two hundred twenty-two million, one hundred twenty-one", and thus it is an aban number.

Divisors: 1 41 29804881 1222000121