31003223101021 has 2 divisors, whose sum is σ = 31003223101022. Its totient is φ = 31003223101020.

The previous prime is 31003223101001. The next prime is 31003223101139. The reversal of 31003223101021 is 12010132230013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21422873395225 + 9580349705796 = 4628485^2 + 3095214^2 .

It is a cyclic number.

It is not a de Polignac number, because 31003223101021 - 2²³ = 31003214712413 is a prime.

It is a super-2 number, since 2×31003223101021² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31003223101021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31003223101001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15501611550510 + 15501611550511.

It is an arithmetic number, because the mean of its divisors is an integer number (15501611550511).

Almost surely, 2^{31003223101021} is an apocalyptic number.

It is an amenable number.

31003223101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

31003223101021 is an equidigital number, since it uses as much as digits as its factorization.

31003223101021 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 19.

Adding to 31003223101021 its reverse (12010132230013), we get a palindrome (43013355331034).

The spelling of 31003223101021 in words is "thirty-one trillion, three billion, two hundred twenty-three million, one hundred one thousand, twenty-one".