21122515150 has 24 divisors (see below), whose sum is σ = 42859504584. Its totient is φ = 7680914400.

The previous prime is 21122515097. The next prime is 21122515151. The reversal of 21122515150 is 5151522112.

It is a happy number.

21122515150 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122515151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19201737 + ... + 19202836.

It is an arithmetic number, because the mean of its divisors is an integer number (1785812691).

Almost surely, 2^21122515150 is an apocalyptic number.

21122515150 is an abundant number, since it is smaller than the sum of its proper divisors (21736989434).

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

21122515150 is a wasteful number, since it uses less digits than its factorization.

21122515150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38404596 (or 38404591 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 25.

The spelling of 21122515150 in words is "twenty-one billion, one hundred twenty-two million, five hundred fifteen thousand, one hundred fifty".