1031311031231 has 16 divisors (see below), whose sum is σ = 1141929925248. Its totient is φ = 925333113600.

The previous prime is 1031311031197. The next prime is 1031311031249. The reversal of 1031311031231 is 1321301131301.

It is a cyclic number.

It is not a de Polignac number, because 1031311031231 - 2²² = 1031306836927 is a prime.

It is a super-2 number, since 2×1031311031231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031311031251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3425516 + ... + 3714401.

It is an arithmetic number, because the mean of its divisors is an integer number (71370620328).

Almost surely, 2^{1031311031231} is an apocalyptic number.

1031311031231 is a deficient number, since it is larger than the sum of its proper divisors (110618894017).

1031311031231 is a wasteful number, since it uses less digits than its factorization.

1031311031231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7140242.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 1031311031231 its reverse (1321301131301), we get a palindrome (2352612162532).

The spelling of 1031311031231 in words is "one trillion, thirty-one billion, three hundred eleven million, thirty-one thousand, two hundred thirty-one".