21142271288 has 16 divisors (see below), whose sum is σ = 39707727360. Its totient is φ = 10553544000.

The previous prime is 21142271257. The next prime is 21142271317. The reversal of 21142271288 is 88217224112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2193848 + ... + 2203463.

It is an arithmetic number, because the mean of its divisors is an integer number (2481732960).

Almost surely, 2^21142271288 is an apocalyptic number.

It is an amenable number.

21142271288 is a deficient number, since it is larger than the sum of its proper divisors (18565456072).

21142271288 is a wasteful number, since it uses less digits than its factorization.

21142271288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4397918 (or 4397914 counting only the distinct ones).

The product of its digits is 28672, while the sum is 38.

The spelling of 21142271288 in words is "twenty-one billion, one hundred forty-two million, two hundred seventy-one thousand, two hundred eighty-eight".