1251423300011 has 4 divisors (see below), whose sum is σ = 1252434961152. Its totient is φ = 1250411638872.

The previous prime is 1251423299977. The next prime is 1251423300037. The reversal of 1251423300011 is 1100033241521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1251423300011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1251423300011.

It is not an unprimeable number, because it can be changed into a prime (1251423302011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505828715 + ... + 505831188.

It is an arithmetic number, because the mean of its divisors is an integer number (313108740288).

Almost surely, 2^{1251423300011} is an apocalyptic number.

1251423300011 is a deficient number, since it is larger than the sum of its proper divisors (1011661141).

1251423300011 is a wasteful number, since it uses less digits than its factorization.

1251423300011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011661140.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 1251423300011 its reverse (1100033241521), we get a palindrome (2351456541532).

The spelling of 1251423300011 in words is "one trillion, two hundred fifty-one billion, four hundred twenty-three million, three hundred thousand, eleven".