1021131361 has 2 divisors, whose sum is σ = 1021131362. Its totient is φ = 1021131360.

The previous prime is 1021131323. The next prime is 1021131409. The reversal of 1021131361 is 1631311201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 863478225 + 157653136 = 29385^2 + 12556^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021131361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021131961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510565680 + 510565681.

It is an arithmetic number, because the mean of its divisors is an integer number (510565681).

Almost surely, 2^1021131361 is an apocalyptic number.

It is an amenable number.

1021131361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021131361 is an equidigital number, since it uses as much as digits as its factorization.

1021131361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1021131361 is about 31955.1460800917. The cubic root of 1021131361 is about 1006.9947464461.

Adding to 1021131361 its reverse (1631311201), we get a palindrome (2652442562).

The spelling of 1021131361 in words is "one billion, twenty-one million, one hundred thirty-one thousand, three hundred sixty-one".