120121356 has 12 divisors (see below), whose sum is σ = 280283192. Its totient is φ = 40040448.

The previous prime is 120121333. The next prime is 120121357. The reversal of 120121356 is 653121021.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (120121357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5005045 + ... + 5005068.

Almost surely, 2^120121356 is an apocalyptic number.

It is an amenable number.

120121356 is an abundant number, since it is smaller than the sum of its proper divisors (160161836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120121356 is a wasteful number, since it uses less digits than its factorization.

120121356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010120 (or 10010118 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 120121356 is about 10959.9888686075. The cubic root of 120121356 is about 493.4086308653.

Adding to 120121356 its reverse (653121021), we get a palindrome (773242377).

The spelling of 120121356 in words is "one hundred twenty million, one hundred twenty-one thousand, three hundred fifty-six".