113211111281 has 2 divisors, whose sum is σ = 113211111282. Its totient is φ = 113211111280.

The previous prime is 113211111253. The next prime is 113211111287. The reversal of 113211111281 is 182111112311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59946625600 + 53264485681 = 244840^2 + 230791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113211111281 is a prime.

It is a super-2 number, since 2×113211111281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (113211111287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56605555640 + 56605555641.

It is an arithmetic number, because the mean of its divisors is an integer number (56605555641).

Almost surely, 2^113211111281 is an apocalyptic number.

It is an amenable number.

113211111281 is a deficient number, since it is larger than the sum of its proper divisors (1).

113211111281 is an equidigital number, since it uses as much as digits as its factorization.

113211111281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 23.

Adding to 113211111281 its reverse (182111112311), we get a palindrome (295322223592).

The spelling of 113211111281 in words is "one hundred thirteen billion, two hundred eleven million, one hundred eleven thousand, two hundred eighty-one".