210221002100122 has 64 divisors (see below), whose sum is σ = 360096013670400. Its totient is φ = 91347877474560.

The previous prime is 210221002100071. The next prime is 210221002100141. The reversal of 210221002100122 is 221001200122012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 210221002100096 and 210221002100105.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1341097 + ... + 20548492.

It is an arithmetic number, because the mean of its divisors is an integer number (5626500213600).

Almost surely, 2^{210221002100122} is an apocalyptic number.

210221002100122 is a deficient number, since it is larger than the sum of its proper divisors (149875011570278).

210221002100122 is a wasteful number, since it uses less digits than its factorization.

210221002100122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21889951.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210221002100122 its reverse (221001200122012), we get a palindrome (431222202222134).

The spelling of 210221002100122 in words is "two hundred ten trillion, two hundred twenty-one billion, two million, one hundred thousand, one hundred twenty-two".