1021120313231 has 2 divisors, whose sum is σ = 1021120313232. Its totient is φ = 1021120313230.

The previous prime is 1021120313219. The next prime is 1021120313249. The reversal of 1021120313231 is 1323130211201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021120313231 - 2¹⁰ = 1021120312207 is a prime.

It is a super-2 number, since 2×1021120313231² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021120313261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510560156615 + 510560156616.

It is an arithmetic number, because the mean of its divisors is an integer number (510560156616).

Almost surely, 2^{1021120313231} is an apocalyptic number.

1021120313231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021120313231 is an equidigital number, since it uses as much as digits as its factorization.

1021120313231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1021120313231 its reverse (1323130211201), we get a palindrome (2344250524432).

The spelling of 1021120313231 in words is "one trillion, twenty-one billion, one hundred twenty million, three hundred thirteen thousand, two hundred thirty-one".