113212331221 has 6 divisors (see below), whose sum is σ = 124440000566. Its totient is φ = 102920301000.

The previous prime is 113212331209. The next prime is 113212331261. The reversal of 113212331221 is 122133212311.

It can be written as a sum of positive squares in only one way, i.e., 105293111121 + 7919220100 = 324489^2 + 88990^2 .

It is not a de Polignac number, because 113212331221 - 2⁹ = 113212330709 is a prime.

It is a super-2 number, since 2×113212331221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113212331192 and 113212331201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113212331201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 467819430 + ... + 467819671.

Almost surely, 2^113212331221 is an apocalyptic number.

113212331221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113212331221 is a deficient number, since it is larger than the sum of its proper divisors (11227669345).

113212331221 is an equidigital number, since it uses as much as digits as its factorization.

113212331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935639123 (or 935639112 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

Adding to 113212331221 its reverse (122133212311), we get a palindrome (235345543532).

The spelling of 113212331221 in words is "one hundred thirteen billion, two hundred twelve million, three hundred thirty-one thousand, two hundred twenty-one".