4020972431401 has 2 divisors, whose sum is σ = 4020972431402. Its totient is φ = 4020972431400.

The previous prime is 4020972431389. The next prime is 4020972431447. The reversal of 4020972431401 is 1041342790204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2644773628176 + 1376198803225 = 1626276^2 + 1173115^2 .

It is a cyclic number.

It is not a de Polignac number, because 4020972431401 - 2⁹ = 4020972430889 is a prime.

It is not a weakly prime, because it can be changed into another prime (4020972441401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010486215700 + 2010486215701.

It is an arithmetic number, because the mean of its divisors is an integer number (2010486215701).

Almost surely, 2^{4020972431401} is an apocalyptic number.

It is an amenable number.

4020972431401 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020972431401 is an equidigital number, since it uses as much as digits as its factorization.

4020972431401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 4020972431401 in words is "four trillion, twenty billion, nine hundred seventy-two million, four hundred thirty-one thousand, four hundred one".