201021221120122 has 32 divisors (see below), whose sum is σ = 330014015735040. Its totient is φ = 91277685629760.

The previous prime is 201021221120011. The next prime is 201021221120123. The reversal of 201021221120122 is 221021122120102.

It is a self number, because there is not a number n which added to its sum of digits gives 201021221120122.

It is not an unprimeable number, because it can be changed into a prime (201021221120123) 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, 194362129 + ... + 195393652.

It is an arithmetic number, because the mean of its divisors is an integer number (10312937991720).

Almost surely, 2^{201021221120122} is an apocalyptic number.

201021221120122 is a deficient number, since it is larger than the sum of its proper divisors (128992794614918).

201021221120122 is a wasteful number, since it uses less digits than its factorization.

201021221120122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389756118.

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

Adding to 201021221120122 its reverse (221021122120102), we get a palindrome (422042343240224).

The spelling of 201021221120122 in words is "two hundred one trillion, twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, one hundred twenty-two".