1251312400011 has 16 divisors (see below), whose sum is σ = 1832585667840. Its totient is φ = 755941586400.

The previous prime is 1251312399923. The next prime is 1251312400043. The reversal of 1251312400011 is 1100042131521.

It is not a de Polignac number, because 1251312400011 - 2¹⁴ = 1251312383627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1251312400111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477234540 + ... + 477237161.

It is an arithmetic number, because the mean of its divisors is an integer number (114536604240).

Almost surely, 2^{1251312400011} is an apocalyptic number.

1251312400011 is a deficient number, since it is larger than the sum of its proper divisors (581273267829).

1251312400011 is a wasteful number, since it uses less digits than its factorization.

1251312400011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954471746.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 1251312400011 its reverse (1100042131521), we get a palindrome (2351354531532).

The spelling of 1251312400011 in words is "one trillion, two hundred fifty-one billion, three hundred twelve million, four hundred thousand, eleven".