201121121220222 has 16 divisors (see below), whose sum is σ = 459705419932032. Its totient is φ = 57463177491480.

The previous prime is 201121121220197. The next prime is 201121121220281. The reversal of 201121121220222 is 222022121121102.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2394299062104 + ... + 2394299062187.

It is an arithmetic number, because the mean of its divisors is an integer number (28731588745752).

Almost surely, 2^{201121121220222} is an apocalyptic number.

201121121220222 is an abundant number, since it is smaller than the sum of its proper divisors (258584298711810).

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

201121121220222 is a wasteful number, since it uses less digits than its factorization.

201121121220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788598124303.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 201121121220222 its reverse (222022121121102), we get a palindrome (423143242341324).

The spelling of 201121121220222 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty-two".