210011222100021 has 16 divisors (see below), whose sum is σ = 282036150144000. Its totient is φ = 138996935522928.

The previous prime is 210011222100011. The next prime is 210011222100037. The reversal of 210011222100021 is 120001222110012.

It is not a de Polignac number, because 210011222100021 - 2⁵ = 210011222099989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210011222100011) 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, 11685540 + ... + 23591826.

It is an arithmetic number, because the mean of its divisors is an integer number (17627259384000).

Almost surely, 2^{210011222100021} is an apocalyptic number.

It is an amenable number.

210011222100021 is a deficient number, since it is larger than the sum of its proper divisors (72024928043979).

210011222100021 is a wasteful number, since it uses less digits than its factorization.

210011222100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11948728.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210011222100021 its reverse (120001222110012), we get a palindrome (330012444210033).

Subtracting from 210011222100021 its reverse (120001222110012), we obtain a palindrome (90009999990009).

The spelling of 210011222100021 in words is "two hundred ten trillion, eleven billion, two hundred twenty-two million, one hundred thousand, twenty-one".