22021101221 has 12 divisors (see below), whose sum is σ = 25718454720. Its totient is φ = 18800019000.

The previous prime is 22021101173. The next prime is 22021101247. The reversal of 22021101221 is 12210112022.

It is not a de Polignac number, because 22021101221 - 2³⁰ = 20947359397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22021101196 and 22021101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021131221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 882941 + ... + 907538.

It is an arithmetic number, because the mean of its divisors is an integer number (2143204560).

Almost surely, 2^22021101221 is an apocalyptic number.

It is an amenable number.

22021101221 is a deficient number, since it is larger than the sum of its proper divisors (3697353499).

22021101221 is a wasteful number, since it uses less digits than its factorization.

22021101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790744 (or 1790737 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22021101221 its reverse (12210112022), we get a palindrome (34231213243).

The spelling of 22021101221 in words is "twenty-two billion, twenty-one million, one hundred one thousand, two hundred twenty-one".