113212211989 has 2 divisors, whose sum is σ = 113212211990. Its totient is φ = 113212211988.

The previous prime is 113212211941. The next prime is 113212211999. The reversal of 113212211989 is 989112212311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91828999089 + 21383212900 = 303033^2 + 146230^2 .

It is a cyclic number.

It is not a de Polignac number, because 113212211989 - 2¹¹ = 113212209941 is a prime.

It is a super-2 number, since 2×113212211989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113212211999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56606105994 + 56606105995.

It is an arithmetic number, because the mean of its divisors is an integer number (56606105995).

Almost surely, 2^113212211989 is an apocalyptic number.

It is an amenable number.

113212211989 is a deficient number, since it is larger than the sum of its proper divisors (1).

113212211989 is an equidigital number, since it uses as much as digits as its factorization.

113212211989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 40.

The spelling of 113212211989 in words is "one hundred thirteen billion, two hundred twelve million, two hundred eleven thousand, nine hundred eighty-nine".