21500150120 has 16 divisors (see below), whose sum is σ = 48375337860. Its totient is φ = 8600060032.

The previous prime is 21500150117. The next prime is 21500150129. The reversal of 21500150120 is 2105100512.

It can be written as a sum of positive squares in 2 ways, for example, as 21258223204 + 241926916 = 145802^2 + 15554^2 .

It is not an unprimeable number, because it can be changed into a prime (21500150129) 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, 268751837 + ... + 268751916.

Almost surely, 2^21500150120 is an apocalyptic number.

21500150120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21500150120 is an abundant number, since it is smaller than the sum of its proper divisors (26875187740).

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

21500150120 is a wasteful number, since it uses less digits than its factorization.

21500150120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537503764 (or 537503760 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

Adding to 21500150120 its reverse (2105100512), we get a palindrome (23605250632).

The spelling of 21500150120 in words is "twenty-one billion, five hundred million, one hundred fifty thousand, one hundred twenty".