21272740012 has 24 divisors (see below), whose sum is σ = 38109367296. Its totient is φ = 10384561488.

The previous prime is 21272740007. The next prime is 21272740031. The reversal of 21272740012 is 21004727212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395613 + ... + 446155.

It is an arithmetic number, because the mean of its divisors is an integer number (1587890304).

Almost surely, 2^21272740012 is an apocalyptic number.

It is an amenable number.

21272740012 is a deficient number, since it is larger than the sum of its proper divisors (16836627284).

21272740012 is a wasteful number, since it uses less digits than its factorization.

21272740012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53037 (or 53035 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The spelling of 21272740012 in words is "twenty-one billion, two hundred seventy-two million, seven hundred forty thousand, twelve".