1131011020331 has 4 divisors (see below), whose sum is σ = 1132666966872. Its totient is φ = 1129355073792.

The previous prime is 1131011020327. The next prime is 1131011020343. The reversal of 1131011020331 is 1330201101311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131011020331 - 2² = 1131011020327 is a prime.

It is a super-2 number, since 2×1131011020331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131011020631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827972246 + ... + 827973611.

It is an arithmetic number, because the mean of its divisors is an integer number (283166741718).

Almost surely, 2^{1131011020331} is an apocalyptic number.

1131011020331 is a deficient number, since it is larger than the sum of its proper divisors (1655946541).

1131011020331 is an equidigital number, since it uses as much as digits as its factorization.

1131011020331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655946540.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 1131011020331 its reverse (1330201101311), we get a palindrome (2461212121642).

The spelling of 1131011020331 in words is "one trillion, one hundred thirty-one billion, eleven million, twenty thousand, three hundred thirty-one".