1251112502001 has 8 divisors (see below), whose sum is σ = 1668220569664. Its totient is φ = 834039717840.

The previous prime is 1251112501979. The next prime is 1251112502051. The reversal of 1251112502001 is 1002052111521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1251112502001 - 2²⁶ = 1251045393137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251112502051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8738026 + ... + 8880051.

It is an arithmetic number, because the mean of its divisors is an integer number (208527571208).

Almost surely, 2^{1251112502001} is an apocalyptic number.

It is an amenable number.

1251112502001 is a deficient number, since it is larger than the sum of its proper divisors (417108067663).

1251112502001 is a wasteful number, since it uses less digits than its factorization.

1251112502001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17641751.

The product of its (nonzero) digits is 200, while the sum is 21.

Adding to 1251112502001 its reverse (1002052111521), we get a palindrome (2253164613522).

The spelling of 1251112502001 in words is "one trillion, two hundred fifty-one billion, one hundred twelve million, five hundred two thousand, one".