21273457457112 has 32 divisors (see below), whose sum is σ = 60781307020800. Its totient is φ = 6078130701984.

The previous prime is 21273457457101. The next prime is 21273457457143. The reversal of 21273457457112 is 21175475437212.

It is a super-2 number, since 2×21273457457112² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63313861312 + ... + 63313861647.

It is an arithmetic number, because the mean of its divisors is an integer number (1899415844400).

Almost surely, 2^{21273457457112} is an apocalyptic number.

It is an amenable number.

21273457457112 is an abundant number, since it is smaller than the sum of its proper divisors (39507849563688).

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

21273457457112 is a wasteful number, since it uses less digits than its factorization.

21273457457112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126627722975 (or 126627722971 counting only the distinct ones).

The product of its digits is 3292800, while the sum is 51.

The spelling of 21273457457112 in words is "twenty-one trillion, two hundred seventy-three billion, four hundred fifty-seven million, four hundred fifty-seven thousand, one hundred twelve".