113555540121 has 4 divisors (see below), whose sum is σ = 151407386832. Its totient is φ = 75703693412.

The previous prime is 113555540117. The next prime is 113555540129. The reversal of 113555540121 is 121045555311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 113555540121 - 2² = 113555540117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (113555540129) 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, 18925923351 + ... + 18925923356.

It is an arithmetic number, because the mean of its divisors is an integer number (37851846708).

Almost surely, 2^113555540121 is an apocalyptic number.

It is an amenable number.

113555540121 is a deficient number, since it is larger than the sum of its proper divisors (37851846711).

113555540121 is an equidigital number, since it uses as much as digits as its factorization.

113555540121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37851846710.

The product of its (nonzero) digits is 15000, while the sum is 33.

The spelling of 113555540121 in words is "one hundred thirteen billion, five hundred fifty-five million, five hundred forty thousand, one hundred twenty-one".