113320212021 has 24 divisors (see below), whose sum is σ = 168476741784. Its totient is φ = 73344061440.

The previous prime is 113320212017. The next prime is 113320212023. The reversal of 113320212021 is 120212023311.

113320212021 is a `hidden beast` number, since 113 + 320 + 212 + 0 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 93131780625 + 20188431396 = 305175^2 + 142086^2 .

It is not a de Polignac number, because 113320212021 - 2² = 113320212017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 113320211985 and 113320212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113320212023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220140 + ... + 524501.

It is an arithmetic number, because the mean of its divisors is an integer number (7019864241).

Almost surely, 2^113320212021 is an apocalyptic number.

It is an amenable number.

113320212021 is a deficient number, since it is larger than the sum of its proper divisors (55156529763).

113320212021 is a wasteful number, since it uses less digits than its factorization.

113320212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745141 (or 745138 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 113320212021 its reverse (120212023311), we get a palindrome (233532235332).

The spelling of 113320212021 in words is "one hundred thirteen billion, three hundred twenty million, two hundred twelve thousand, twenty-one".