20211321313037 has 2 divisors, whose sum is σ = 20211321313038. Its totient is φ = 20211321313036.

The previous prime is 20211321312983. The next prime is 20211321313067. The reversal of 20211321313037 is 73031312311202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14283781213321 + 5927540099716 = 3779389^2 + 2434654^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211321313037 - 2³⁸ = 19936443406093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211321313067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105660656518 + 10105660656519.

It is an arithmetic number, because the mean of its divisors is an integer number (10105660656519).

Almost surely, 2^{20211321313037} is an apocalyptic number.

It is an amenable number.

20211321313037 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211321313037 is an equidigital number, since it uses as much as digits as its factorization.

20211321313037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

Adding to 20211321313037 its reverse (73031312311202), we get a palindrome (93242633624239).

The spelling of 20211321313037 in words is "twenty trillion, two hundred eleven billion, three hundred twenty-one million, three hundred thirteen thousand, thirty-seven".