121112555 has 16 divisors (see below), whose sum is σ = 158263200. Its totient is φ = 88623360.

The previous prime is 121112543. The next prime is 121112587. The reversal of 121112555 is 555211121.

It is not a de Polignac number, because 121112555 - 2⁶ = 121112491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121112555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19226 + ... + 24735.

It is an arithmetic number, because the mean of its divisors is an integer number (9891450).

Almost surely, 2^121112555 is an apocalyptic number.

121112555 is a deficient number, since it is larger than the sum of its proper divisors (37150645).

121112555 is a wasteful number, since it uses less digits than its factorization.

121112555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44014.

The product of its digits is 500, while the sum is 23.

The square root of 121112555 is about 11005.1149471507. The cubic root of 121112555 is about 494.7620595711.

Adding to 121112555 its reverse (555211121), we get a palindrome (676323676).

The spelling of 121112555 in words is "one hundred twenty-one million, one hundred twelve thousand, five hundred fifty-five".