210021021020120 has 128 divisors (see below), whose sum is σ = 484657589505600. Its totient is φ = 81860452761600.

The previous prime is 210021021020119. The next prime is 210021021020123. The reversal of 210021021020120 is 21020120120012.

It is a junction number, because it is equal to n+sod(n) for n = 210021021020095 and 210021021020104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021021020123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10596943571 + ... + 10596963389.

Almost surely, 2^{210021021020120} is an apocalyptic number.

210021021020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210021021020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242328794752800).

210021021020120 is an abundant number, since it is smaller than the sum of its proper divisors (274636568485480).

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

210021021020120 is a wasteful number, since it uses less digits than its factorization.

210021021020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27349 (or 27345 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 210021021020120 its reverse (21020120120012), we get a palindrome (231041141140132).

The spelling of 210021021020120 in words is "two hundred ten trillion, twenty-one billion, twenty-one million, twenty thousand, one hundred twenty".