201221002121022 has 32 divisors (see below), whose sum is σ = 481554534992160. Its totient is φ = 61914154498560.

The previous prime is 201221002121021. The next prime is 201221002121039. The reversal of 201221002121022 is 220121200122102.

It is a happy number.

201221002121022 is a `hidden beast` number, since 201 + 2 + 210 + 0 + 21 + 210 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 201221002120986 and 201221002121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221002121021) 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, 143319801379 + ... + 143319802782.

It is an arithmetic number, because the mean of its divisors is an integer number (15048579218505).

Almost surely, 2^{201221002121022} is an apocalyptic number.

201221002121022 is an abundant number, since it is smaller than the sum of its proper divisors (280333532871138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201221002121022 is a wasteful number, since it uses less digits than its factorization.

201221002121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286639604185 (or 286639604179 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201221002121022 its reverse (220121200122102), we get a palindrome (421342202243124).

The spelling of 201221002121022 in words is "two hundred one trillion, two hundred twenty-one billion, two million, one hundred twenty-one thousand, twenty-two".