21020132112984 has 96 divisors (see below), whose sum is σ = 59101580538000. Its totient is φ = 6999167895552.

The previous prime is 21020132112943. The next prime is 21020132113051. The reversal of 21020132112984 is 48921123102012.

It is a happy number.

21020132112984 is a `hidden beast` number, since 2 + 1 + 0 + 201 + 321 + 129 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4013629 + ... + 7625580.

Almost surely, 2^{21020132112984} is an apocalyptic number.

21020132112984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21020132112984 is an abundant number, since it is smaller than the sum of its proper divisors (38081448425016).

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

21020132112984 is a wasteful number, since it uses less digits than its factorization.

21020132112984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11640159 (or 11640143 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

Adding to 21020132112984 its reverse (48921123102012), we get a palindrome (69941255214996).

The spelling of 21020132112984 in words is "twenty-one trillion, twenty billion, one hundred thirty-two million, one hundred twelve thousand, nine hundred eighty-four".