201220410431951 has 2 divisors, whose sum is σ = 201220410431952. Its totient is φ = 201220410431950.

The previous prime is 201220410431927. The next prime is 201220410432029. The reversal of 201220410431951 is 159134014022102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201220410431951 is a prime.

It is a super-4 number, since 4×201220410431951⁴ (a number of 58 digits) contains 4444 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201220410431351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610205215975 + 100610205215976.

It is an arithmetic number, because the mean of its divisors is an integer number (100610205215976).

Almost surely, 2^{201220410431951} is an apocalyptic number.

201220410431951 is a deficient number, since it is larger than the sum of its proper divisors (1).

201220410431951 is an equidigital number, since it uses as much as digits as its factorization.

201220410431951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 201220410431951 in words is "two hundred one trillion, two hundred twenty billion, four hundred ten million, four hundred thirty-one thousand, nine hundred fifty-one".