31133010322021 has 2 divisors, whose sum is σ = 31133010322022. Its totient is φ = 31133010322020.

The previous prime is 31133010321983. The next prime is 31133010322079. The reversal of 31133010322021 is 12022301033113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16132191920100 + 15000818401921 = 4016490^2 + 3873089^2 .

It is a cyclic number.

It is not a de Polignac number, because 31133010322021 - 2⁷ = 31133010321893 is a prime.

It is a super-2 number, since 2×31133010322021² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31133010321983 and 31133010322001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31133010322091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15566505161010 + 15566505161011.

It is an arithmetic number, because the mean of its divisors is an integer number (15566505161011).

Almost surely, 2^{31133010322021} is an apocalyptic number.

It is an amenable number.

31133010322021 is a deficient number, since it is larger than the sum of its proper divisors (1).

31133010322021 is an equidigital number, since it uses as much as digits as its factorization.

31133010322021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31133010322021 its reverse (12022301033113), we get a palindrome (43155311355134).

The spelling of 31133010322021 in words is "thirty-one trillion, one hundred thirty-three billion, ten million, three hundred twenty-two thousand, twenty-one".