21010651120 has 20 divisors (see below), whose sum is σ = 48849764040. Its totient is φ = 8404260416.

The previous prime is 21010651093. The next prime is 21010651127. The reversal of 21010651120 is 2115601012.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010651127) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 131316490 + ... + 131316649.

It is an arithmetic number, because the mean of its divisors is an integer number (2442488202).

Almost surely, 2^21010651120 is an apocalyptic number.

21010651120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010651120 is an abundant number, since it is smaller than the sum of its proper divisors (27839112920).

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

21010651120 is a wasteful number, since it uses less digits than its factorization.

21010651120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262633152 (or 262633146 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The spelling of 21010651120 in words is "twenty-one billion, ten million, six hundred fifty-one thousand, one hundred twenty".