251121140999 has 2 divisors, whose sum is σ = 251121141000. Its totient is φ = 251121140998.

The previous prime is 251121140951. The next prime is 251121141023. The reversal of 251121140999 is 999041121152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251121140999 - 2³² = 246826173703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251121142999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125560570499 + 125560570500.

It is an arithmetic number, because the mean of its divisors is an integer number (125560570500).

Almost surely, 2^251121140999 is an apocalyptic number.

251121140999 is a deficient number, since it is larger than the sum of its proper divisors (1).

251121140999 is an equidigital number, since it uses as much as digits as its factorization.

251121140999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 44.

The spelling of 251121140999 in words is "two hundred fifty-one billion, one hundred twenty-one million, one hundred forty thousand, nine hundred ninety-nine".