210120212201021 has 12 divisors (see below), whose sum is σ = 223252441996992. Its totient is φ = 197720190241728.

The previous prime is 210120212200981. The next prime is 210120212201057. The reversal of 210120212201021 is 120102212021012.

It is not a de Polignac number, because 210120212201021 - 2²⁶ = 210120145092157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210120212801021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72115835 + ... + 74972888.

It is an arithmetic number, because the mean of its divisors is an integer number (18604370166416).

Almost surely, 2^{210120212201021} is an apocalyptic number.

It is an amenable number.

210120212201021 is a deficient number, since it is larger than the sum of its proper divisors (13132229795971).

210120212201021 is a wasteful number, since it uses less digits than its factorization.

210120212201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147093700 (or 147093683 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210120212201021 its reverse (120102212021012), we get a palindrome (330222424222033).

The spelling of 210120212201021 in words is "two hundred ten trillion, one hundred twenty billion, two hundred twelve million, two hundred one thousand, twenty-one".