210121210220122 has 16 divisors (see below), whose sum is σ = 316572935249952. Its totient is φ = 104596906230160.

The previous prime is 210121210220111. The next prime is 210121210220147. The reversal of 210121210220122 is 221022012121012.

It is a self number, because there is not a number n which added to its sum of digits gives 210121210220122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54055872 + ... + 57812452.

It is an arithmetic number, because the mean of its divisors is an integer number (19785808453122).

Almost surely, 2^{210121210220122} is an apocalyptic number.

210121210220122 is a deficient number, since it is larger than the sum of its proper divisors (106451725029830).

210121210220122 is a wasteful number, since it uses less digits than its factorization.

210121210220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880013.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 210121210220122 its reverse (221022012121012), we get a palindrome (431143222341134).

The spelling of 210121210220122 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-two".