250112511221 has 4 divisors (see below), whose sum is σ = 251509788000. Its totient is φ = 248715234444.

The previous prime is 250112511211. The next prime is 250112511227. The reversal of 250112511221 is 122115211052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-250112511221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250112511227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698638121 + ... + 698638478.

It is an arithmetic number, because the mean of its divisors is an integer number (62877447000).

Almost surely, 2^250112511221 is an apocalyptic number.

It is an amenable number.

250112511221 is a deficient number, since it is larger than the sum of its proper divisors (1397276779).

250112511221 is a wasteful number, since it uses less digits than its factorization.

250112511221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397276778.

The product of its (nonzero) digits is 400, while the sum is 23.

Adding to 250112511221 its reverse (122115211052), we get a palindrome (372227722273).

The spelling of 250112511221 in words is "two hundred fifty billion, one hundred twelve million, five hundred eleven thousand, two hundred twenty-one".