21123132000000 has 252 divisors, whose sum is σ = 70272060037368. Its totient is φ = 5632832000000.

The previous prime is 21123131999989. The next prime is 21123132000011. The reversal of 21123132000000 is 23132112.

It is an interprime number because it is at equal distance from previous prime (21123131999989) and next prime (21123132000011).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 11119870 + ... + 12880130.

Almost surely, 2^{21123132000000} is an apocalyptic number.

21123132000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21123132000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35136030018684).

21123132000000 is an abundant number, since it is smaller than the sum of its proper divisors (49148928037368).

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

21123132000000 is an frugal number, since it uses more digits than its factorization.

21123132000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760310 (or 1760271 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21123132000000 its reverse (23132112), we get a palindrome (21123155132112).

The spelling of 21123132000000 in words is "twenty-one trillion, one hundred twenty-three billion, one hundred thirty-two million", and thus it is an aban number.