201220011221022 has 64 divisors (see below), whose sum is σ = 451590675609600. Its totient is φ = 66408095786400.

The previous prime is 201220011220979. The next prime is 201220011221051. The reversal of 201220011221022 is 220122110022102.

It is a happy number.

201220011221022 is a `hidden beast` number, since 201 + 220 + 0 + 1 + 1 + 221 + 0 + 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 = 201220011220986 and 201220011221004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 350290683 + ... + 350864649.

It is an arithmetic number, because the mean of its divisors is an integer number (7056104306400).

Almost surely, 2^{201220011221022} is an apocalyptic number.

201220011221022 is an abundant number, since it is smaller than the sum of its proper divisors (250370664388578).

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

201220011221022 is a wasteful number, since it uses less digits than its factorization.

201220011221022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638358 (or 638352 counting only the distinct ones).

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

Adding to 201220011221022 its reverse (220122110022102), we get a palindrome (421342121243124).

The spelling of 201220011221022 in words is "two hundred one trillion, two hundred twenty billion, eleven million, two hundred twenty-one thousand, twenty-two".