201121112222222 has 4 divisors (see below), whose sum is σ = 301681668333336. Its totient is φ = 100560556111110.

The previous prime is 201121112222197. The next prime is 201121112222257. The reversal of 201121112222222 is 222222211121102.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×201121112222222² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50280278055554 + ... + 50280278055557.

It is an arithmetic number, because the mean of its divisors is an integer number (75420417083334).

Almost surely, 2^{201121112222222} is an apocalyptic number.

201121112222222 is a deficient number, since it is larger than the sum of its proper divisors (100560556111114).

201121112222222 is a wasteful number, since it uses less digits than its factorization.

201121112222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100560556111113.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 201121112222222 its reverse (222222211121102), we get a palindrome (423343323343324).

The spelling of 201121112222222 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twenty-two thousand, two hundred twenty-two".