22012121120221 has 16 divisors (see below), whose sum is σ = 22290010445248. Its totient is φ = 21736428537600.

The previous prime is 22012121120183. The next prime is 22012121120237. The reversal of 22012121120221 is 12202112121022.

It is a cyclic number.

It is not a de Polignac number, because 22012121120221 - 2¹¹ = 22012121118173 is a prime.

It is a super-2 number, since 2×22012121120221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012121120281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15871150 + ... + 17202256.

It is an arithmetic number, because the mean of its divisors is an integer number (1393125652828).

Almost surely, 2^{22012121120221} is an apocalyptic number.

It is an amenable number.

22012121120221 is a deficient number, since it is larger than the sum of its proper divisors (277889325027).

22012121120221 is a wasteful number, since it uses less digits than its factorization.

22012121120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331932.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22012121120221 its reverse (12202112121022), we get a palindrome (34214233241243).

The spelling of 22012121120221 in words is "twenty-two trillion, twelve billion, one hundred twenty-one million, one hundred twenty thousand, two hundred twenty-one".