1251045010123 has 12 divisors (see below), whose sum is σ = 1335190466520. Its totient is φ = 1171883645856.

The previous prime is 1251045010093. The next prime is 1251045010141. The reversal of 1251045010123 is 3210105401521.

It is not a de Polignac number, because 1251045010123 - 2⁹ = 1251045009611 is a prime.

It is a super-2 number, since 2×1251045010123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251045010223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19436965 + ... + 19501222.

It is an arithmetic number, because the mean of its divisors is an integer number (111265872210).

Almost surely, 2^{1251045010123} is an apocalyptic number.

1251045010123 is a deficient number, since it is larger than the sum of its proper divisors (84145456397).

1251045010123 is an equidigital number, since it uses as much as digits as its factorization.

1251045010123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38938314 (or 38938295 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 1251045010123 in words is "one trillion, two hundred fifty-one billion, forty-five million, ten thousand, one hundred twenty-three".