21014512112 has 80 divisors (see below), whose sum is σ = 45592736640. Its totient is φ = 9300614400.

The previous prime is 21014512093. The next prime is 21014512133. The reversal of 21014512112 is 21121541012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2500814 + ... + 2509202.

It is an arithmetic number, because the mean of its divisors is an integer number (569909208).

Almost surely, 2^21014512112 is an apocalyptic number.

21014512112 is a gapful number since it is divisible by the number (22) 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 21014512112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22796368320).

21014512112 is an abundant number, since it is smaller than the sum of its proper divisors (24578224528).

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

21014512112 is a wasteful number, since it uses less digits than its factorization.

21014512112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8782 (or 8776 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The spelling of 21014512112 in words is "twenty-one billion, fourteen million, five hundred twelve thousand, one hundred twelve".