210121201121122 has 16 divisors (see below), whose sum is σ = 319899412036512. Its totient is φ = 103488195191040.

The previous prime is 210121201121089. The next prime is 210121201121123. The reversal of 210121201121122 is 221121102121012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 210121201121122.

It is not an unprimeable number, because it can be changed into a prime (210121201121123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29642904 + ... + 36040867.

It is an arithmetic number, because the mean of its divisors is an integer number (19993713252282).

Almost surely, 2^{210121201121122} is an apocalyptic number.

210121201121122 is a deficient number, since it is larger than the sum of its proper divisors (109778210915390).

210121201121122 is a wasteful number, since it uses less digits than its factorization.

210121201121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65707713.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 210121201121122 its reverse (221121102121012), we get a palindrome (431242303242134).

The spelling of 210121201121122 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred one million, one hundred twenty-one thousand, one hundred twenty-two".