21153542553112 has 16 divisors (see below), whose sum is σ = 41996003598360. Its totient is φ = 9954608260224.

The previous prime is 21153542553107. The next prime is 21153542553133. The reversal of 21153542553112 is 21135524535112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77770376898 + ... + 77770377169.

Almost surely, 2^{21153542553112} is an apocalyptic number.

It is an amenable number.

21153542553112 is a deficient number, since it is larger than the sum of its proper divisors (20842461045248).

21153542553112 is a wasteful number, since it uses less digits than its factorization.

21153542553112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155540754090 (or 155540754086 counting only the distinct ones).

The product of its digits is 180000, while the sum is 40.

The spelling of 21153542553112 in words is "twenty-one trillion, one hundred fifty-three billion, five hundred forty-two million, five hundred fifty-three thousand, one hundred twelve".