951021021131989 has 2 divisors, whose sum is σ = 951021021131990. Its totient is φ = 951021021131988.

The previous prime is 951021021131983. The next prime is 951021021132067. The reversal of 951021021131989 is 989131120120159.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 928166980383889 + 22854040748100 = 30465833^2 + 4780590^2 .

It is a cyclic number.

It is not a de Polignac number, because 951021021131989 - 2¹⁹ = 951021020607701 is a prime.

It is a super-2 number, since 2×951021021131989² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (951021021131983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 475510510565994 + 475510510565995.

It is an arithmetic number, because the mean of its divisors is an integer number (475510510565995).

Almost surely, 2^{951021021131989} is an apocalyptic number.

It is an amenable number.

951021021131989 is a deficient number, since it is larger than the sum of its proper divisors (1).

951021021131989 is an equidigital number, since it uses as much as digits as its factorization.

951021021131989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 52.

The spelling of 951021021131989 in words is "nine hundred fifty-one trillion, twenty-one billion, twenty-one million, one hundred thirty-one thousand, nine hundred eighty-nine".