311020001021 has 2 divisors, whose sum is σ = 311020001022. Its totient is φ = 311020001020.

The previous prime is 311020000969. The next prime is 311020001053. The reversal of 311020001021 is 120100020113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309871468921 + 1148532100 = 556661^2 + 33890^2 .

It is a cyclic number.

It is not a de Polignac number, because 311020001021 - 2¹⁴ = 311019984637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311020000993 and 311020001011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311020006021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155510000510 + 155510000511.

It is an arithmetic number, because the mean of its divisors is an integer number (155510000511).

Almost surely, 2^311020001021 is an apocalyptic number.

It is an amenable number.

311020001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

311020001021 is an equidigital number, since it uses as much as digits as its factorization.

311020001021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 311020001021 its reverse (120100020113), we get a palindrome (431120021134).

The spelling of 311020001021 in words is "three hundred eleven billion, twenty million, one thousand, twenty-one".