31033010233021 has 2 divisors, whose sum is σ = 31033010233022. Its totient is φ = 31033010233020.

The previous prime is 31033010232997. The next prime is 31033010233073. The reversal of 31033010233021 is 12033201033013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29748843062500 + 1284167170521 = 5454250^2 + 1133211^2 .

It is a cyclic number.

It is not a de Polignac number, because 31033010233021 - 2¹⁵ = 31033010200253 is a prime.

It is a super-2 number, since 2×31033010233021² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31033010232983 and 31033010233001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31033010233081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15516505116510 + 15516505116511.

It is an arithmetic number, because the mean of its divisors is an integer number (15516505116511).

Almost surely, 2^{31033010233021} is an apocalyptic number.

It is an amenable number.

31033010233021 is a deficient number, since it is larger than the sum of its proper divisors (1).

31033010233021 is an equidigital number, since it uses as much as digits as its factorization.

31033010233021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31033010233021 its reverse (12033201033013), we get a palindrome (43066211266034).

The spelling of 31033010233021 in words is "thirty-one trillion, thirty-three billion, ten million, two hundred thirty-three thousand, twenty-one".