201222221121020 has 96 divisors (see below), whose sum is σ = 469665873948096. Its totient is φ = 71806117376000.

The previous prime is 201222221121001. The next prime is 201222221121041. The reversal of 201222221121020 is 20121122222102.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 201222221120983 and 201222221121001.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 37559519 + ... + 42581238.

It is an arithmetic number, because the mean of its divisors is an integer number (4892352853626).

Almost surely, 2^{201222221121020} is an apocalyptic number.

201222221121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201222221121020 is an abundant number, since it is smaller than the sum of its proper divisors (268443652827076).

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

201222221121020 is a wasteful number, since it uses less digits than its factorization.

201222221121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80140991 (or 80140989 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 201222221121020 its reverse (20121122222102), we get a palindrome (221343343343122).

The spelling of 201222221121020 in words is "two hundred one trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-one thousand, twenty".