210021201021 has 16 divisors (see below), whose sum is σ = 282281457600. Its totient is φ = 138891366528.

The previous prime is 210021201017. The next prime is 210021201023. The reversal of 210021201021 is 120102120012.

It is not a de Polignac number, because 210021201021 - 2² = 210021201017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210021200988 and 210021201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021201023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258486 + ... + 697751.

It is an arithmetic number, because the mean of its divisors is an integer number (17642591100).

Almost surely, 2^210021201021 is an apocalyptic number.

It is an amenable number.

210021201021 is a deficient number, since it is larger than the sum of its proper divisors (72260256579).

210021201021 is a wasteful number, since it uses less digits than its factorization.

210021201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956828.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210021201021 its reverse (120102120012), we get a palindrome (330123321033).

The spelling of 210021201021 in words is "two hundred ten billion, twenty-one million, two hundred one thousand, twenty-one".