113404312021 has 16 divisors (see below), whose sum is σ = 152263133568. Its totient is φ = 81569534400.

The previous prime is 113404311991. The next prime is 113404312027. The reversal of 113404312021 is 120213404311.

It is a cyclic number.

It is not a de Polignac number, because 113404312021 - 2⁹ = 113404311509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 113404311983 and 113404312001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113404312027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56644510 + ... + 56646511.

It is an arithmetic number, because the mean of its divisors is an integer number (9516445848).

Almost surely, 2^113404312021 is an apocalyptic number.

113404312021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113404312021 is a deficient number, since it is larger than the sum of its proper divisors (38858821547).

113404312021 is a wasteful number, since it uses less digits than its factorization.

113404312021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113291052.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 113404312021 its reverse (120213404311), we get a palindrome (233617716332).

The spelling of 113404312021 in words is "one hundred thirteen billion, four hundred four million, three hundred twelve thousand, twenty-one".