21120001023000 has 192 divisors, whose sum is σ = 72429386571360. Its totient is φ = 5120000160000.

The previous prime is 21120001022999. The next prime is 21120001023019. The reversal of 21120001023000 is 32010002112.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28727911 + ... + 29453910.

Almost surely, 2^{21120001023000} is an apocalyptic number.

21120001023000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120001023000 is an abundant number, since it is smaller than the sum of its proper divisors (51309385548360).

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

21120001023000 is a wasteful number, since it uses less digits than its factorization.

21120001023000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58181867 (or 58181842 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21120001023000 its reverse (32010002112), we get a palindrome (21152011025112).

The spelling of 21120001023000 in words is "twenty-one trillion, one hundred twenty billion, one million, twenty-three thousand".