113105154221 has 4 divisors (see below), whose sum is σ = 115511646912. Its totient is φ = 110698661532.

The previous prime is 113105154203. The next prime is 113105154241. The reversal of 113105154221 is 122451501311.

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 a de Polignac number, because none of the positive numbers 2^k-113105154221 is a prime.

It is a super-2 number, since 2×113105154221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113105154241) 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, 1203246275 + ... + 1203246368.

It is an arithmetic number, because the mean of its divisors is an integer number (28877911728).

Almost surely, 2^113105154221 is an apocalyptic number.

It is an amenable number.

113105154221 is a deficient number, since it is larger than the sum of its proper divisors (2406492691).

113105154221 is an equidigital number, since it uses as much as digits as its factorization.

113105154221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406492690.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 113105154221 its reverse (122451501311), we get a palindrome (235556655532).

The spelling of 113105154221 in words is "one hundred thirteen billion, one hundred five million, one hundred fifty-four thousand, two hundred twenty-one".