22120011121221 has 48 divisors (see below), whose sum is σ = 34869484855296. Its totient is φ = 13430541011328.

The previous prime is 22120011121199. The next prime is 22120011121223. The reversal of 22120011121221 is 12212111002122.

22120011121221 is a `hidden beast` number, since 221 + 200 + 1 + 1 + 1 + 21 + 221 = 666.

It is not a de Polignac number, because 22120011121221 - 2¹⁰ = 22120011120197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22120011121194 and 22120011121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120011121223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5846716 + ... + 8855738.

It is an arithmetic number, because the mean of its divisors is an integer number (726447601152).

Almost surely, 2^{22120011121221} is an apocalyptic number.

It is an amenable number.

22120011121221 is a deficient number, since it is larger than the sum of its proper divisors (12749473734075).

22120011121221 is a wasteful number, since it uses less digits than its factorization.

22120011121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009882 (or 3009879 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22120011121221 its reverse (12212111002122), we get a palindrome (34332122123343).

The spelling of 22120011121221 in words is "twenty-two trillion, one hundred twenty billion, eleven million, one hundred twenty-one thousand, two hundred twenty-one".