21150134412 has 96 divisors (see below), whose sum is σ = 54154033920. Its totient is φ = 6371493120.

The previous prime is 21150134363. The next prime is 21150134497. The reversal of 21150134412 is 21443105112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25512414 + ... + 25513242.

It is an arithmetic number, because the mean of its divisors is an integer number (564104520).

Almost surely, 2^21150134412 is an apocalyptic number.

21150134412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21150134412 is an abundant number, since it is smaller than the sum of its proper divisors (33003899508).

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

21150134412 is a wasteful number, since it uses less digits than its factorization.

21150134412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751 (or 1749 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 21150134412 its reverse (21443105112), we get a palindrome (42593239524).

The spelling of 21150134412 in words is "twenty-one billion, one hundred fifty million, one hundred thirty-four thousand, four hundred twelve".