210221221220122 has 16 divisors (see below), whose sum is σ = 361150926402240. Its totient is φ = 89901886588128.

The previous prime is 210221221220119. The next prime is 210221221220249. The reversal of 210221221220122 is 221022122122012.

It is a junction number, because it is equal to n+sod(n) for n = 210221221220093 and 210221221220102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16076868747 + ... + 16076881822.

It is an arithmetic number, because the mean of its divisors is an integer number (22571932900140).

Almost surely, 2^{210221221220122} is an apocalyptic number.

210221221220122 is a deficient number, since it is larger than the sum of its proper divisors (150929705182118).

210221221220122 is a wasteful number, since it uses less digits than its factorization.

210221221220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32153751045.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 210221221220122 its reverse (221022122122012), we get a palindrome (431243343342134).

It can be divided in two parts, 21022122122012 and 2, that multiplied together give a palindrome (42044244244024).

The spelling of 210221221220122 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twenty-two".