21124071276 has 96 divisors (see below), whose sum is σ = 65066706432. Its totient is φ = 5164016640.

The previous prime is 21124071257. The next prime is 21124071323. The reversal of 21124071276 is 67217042112.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 656691 + ... + 688106.

It is an arithmetic number, because the mean of its divisors is an integer number (677778192).

Almost surely, 2^21124071276 is an apocalyptic number.

It is an amenable number.

21124071276 is an abundant number, since it is smaller than the sum of its proper divisors (43942635156).

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

21124071276 is a wasteful number, since it uses less digits than its factorization.

21124071276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344839 (or 1344837 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The spelling of 21124071276 in words is "twenty-one billion, one hundred twenty-four million, seventy-one thousand, two hundred seventy-six".