21010220231120 has 40 divisors (see below), whose sum is σ = 49205322369864. Its totient is φ = 8342744379392.

The previous prime is 21010220231069. The next prime is 21010220231149. The reversal of 21010220231120 is 2113202201012.

It can be written as a sum of positive squares in 4 ways, for example, as 1819757832256 + 19190462398864 = 1348984^2 + 4380692^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 958484489 + ... + 958506408.

Almost surely, 2^{21010220231120} is an apocalyptic number.

21010220231120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010220231120 is an abundant number, since it is smaller than the sum of its proper divisors (28195102138744).

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

21010220231120 is a wasteful number, since it uses less digits than its factorization.

21010220231120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916991047 (or 1916991041 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21010220231120 its reverse (2113202201012), we get a palindrome (23123422432132).

The spelling of 21010220231120 in words is "twenty-one trillion, ten billion, two hundred twenty million, two hundred thirty-one thousand, one hundred twenty".