4020410121961 has 2 divisors, whose sum is σ = 4020410121962. Its totient is φ = 4020410121960.

The previous prime is 4020410121947. The next prime is 4020410122021. The reversal of 4020410121961 is 1691210140204.

4020410121961 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2603643643561 + 1416766478400 = 1613581^2 + 1190280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4020410121961 is a prime.

It is not a weakly prime, because it can be changed into another prime (4020410121461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010205060980 + 2010205060981.

It is an arithmetic number, because the mean of its divisors is an integer number (2010205060981).

Almost surely, 2^{4020410121961} is an apocalyptic number.

It is an amenable number.

4020410121961 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020410121961 is an equidigital number, since it uses as much as digits as its factorization.

4020410121961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 4020410121961 in words is "four trillion, twenty billion, four hundred ten million, one hundred twenty-one thousand, nine hundred sixty-one".