210021011121120 has 96 divisors (see below), whose sum is σ = 661568420564352. Its totient is φ = 56005413714432.

The previous prime is 210021011121109. The next prime is 210021011121139. The reversal of 210021011121120 is 21121110120012.

It is a happy number.

210021011121120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×210021011121120² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 210021011121120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195863559 + ... + 196932921.

It is an arithmetic number, because the mean of its divisors is an integer number (6891337714212).

Almost surely, 2^{210021011121120} is an apocalyptic number.

210021011121120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210021011121120 is an abundant number, since it is smaller than the sum of its proper divisors (451547409443232).

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

210021011121120 is a wasteful number, since it uses less digits than its factorization.

210021011121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478544 (or 1478536 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210021011121120 its reverse (21121110120012), we get a palindrome (231142121241132).

The spelling of 210021011121120 in words is "two hundred ten trillion, twenty-one billion, eleven million, one hundred twenty-one thousand, one hundred twenty".