1021331131 has 2 divisors, whose sum is σ = 1021331132. Its totient is φ = 1021331130.

The previous prime is 1021331119. The next prime is 1021331137. The reversal of 1021331131 is 1311331201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021331131 is a prime.

It is a super-2 number, since 2×1021331131² = 2086234558299478322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1021331137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510665565 + 510665566.

It is an arithmetic number, because the mean of its divisors is an integer number (510665566).

Almost surely, 2^1021331131 is an apocalyptic number.

1021331131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021331131 is an equidigital number, since it uses as much as digits as its factorization.

1021331131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1021331131 is about 31958.2717148472. The cubic root of 1021331131 is about 1007.0604102875.

Adding to 1021331131 its reverse (1311331201), we get a palindrome (2332662332).

The spelling of 1021331131 in words is "one billion, twenty-one million, three hundred thirty-one thousand, one hundred thirty-one".