1251421014089 has 2 divisors, whose sum is σ = 1251421014090. Its totient is φ = 1251421014088.

The previous prime is 1251421014029. The next prime is 1251421014133. The reversal of 1251421014089 is 9804101241521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1176964614400 + 74456399689 = 1084880^2 + 272867^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251421014089 - 2²⁰ = 1251419965513 is a prime.

It is a super-2 number, since 2×1251421014089² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1251421014029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625710507044 + 625710507045.

It is an arithmetic number, because the mean of its divisors is an integer number (625710507045).

Almost surely, 2^{1251421014089} is an apocalyptic number.

It is an amenable number.

1251421014089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251421014089 is an equidigital number, since it uses as much as digits as its factorization.

1251421014089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 38.

The spelling of 1251421014089 in words is "one trillion, two hundred fifty-one billion, four hundred twenty-one million, fourteen thousand, eighty-nine".