251121141006 has 16 divisors (see below), whose sum is σ = 507885454800. Its totient is φ = 82766518208.

The previous prime is 251121140999. The next prime is 251121141023. The reversal of 251121141006 is 600141121152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235131621 + ... + 235132688.

It is an arithmetic number, because the mean of its divisors is an integer number (31742840925).

Almost surely, 2^251121141006 is an apocalyptic number.

251121141006 is an abundant number, since it is smaller than the sum of its proper divisors (256764313794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251121141006 is a wasteful number, since it uses less digits than its factorization.

251121141006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470264403.

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 251121141006 its reverse (600141121152), we get a palindrome (851262262158).

The spelling of 251121141006 in words is "two hundred fifty-one billion, one hundred twenty-one million, one hundred forty-one thousand, six".