201221131122 has 32 divisors (see below), whose sum is σ = 487808804160. Its totient is φ = 60976100160.

The previous prime is 201221131117. The next prime is 201221131157. The reversal of 201221131122 is 221131122102.

It is a super-2 number, since 2×201221131122² (a number of 23 digits) contains 22 as substring.

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 = 201221131095 and 201221131104.

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 15 ways as a sum of consecutive naturals, for example, 169377463 + ... + 169378650.

It is an arithmetic number, because the mean of its divisors is an integer number (15244025130).

Almost surely, 2^201221131122 is an apocalyptic number.

201221131122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

201221131122 is an abundant number, since it is smaller than the sum of its proper divisors (286587673038).

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

201221131122 is a wasteful number, since it uses less digits than its factorization.

201221131122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338756135 (or 338756129 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 201221131122 its reverse (221131122102), we get a palindrome (422352253224).

The spelling of 201221131122 in words is "two hundred one billion, two hundred twenty-one million, one hundred thirty-one thousand, one hundred twenty-two".