113121031 has 2 divisors, whose sum is σ = 113121032. Its totient is φ = 113121030.

The previous prime is 113120981. The next prime is 113121049. The reversal of 113121031 is 130121311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 113121031 - 2¹⁷ = 112989959 is a prime.

It is a super-2 number, since 2×113121031² = 25592735309005922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113124031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56560515 + 56560516.

It is an arithmetic number, because the mean of its divisors is an integer number (56560516).

Almost surely, 2^113121031 is an apocalyptic number.

113121031 is a deficient number, since it is larger than the sum of its proper divisors (1).

113121031 is an equidigital number, since it uses as much as digits as its factorization.

113121031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 113121031 is about 10635.8371085684. The cubic root of 113121031 is about 483.6313573285.

Adding to 113121031 its reverse (130121311), we get a palindrome (243242342).

The spelling of 113121031 in words is "one hundred thirteen million, one hundred twenty-one thousand, thirty-one".