22012121120201 has 4 divisors (see below), whose sum is σ = 22014019219332. Its totient is φ = 22010223021072.

The previous prime is 22012121120183. The next prime is 22012121120237. The reversal of 22012121120201 is 10202112121022.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19969494188176 + 2042626932025 = 4468724^2 + 1429205^2 .

It is a cyclic number.

It is not a de Polignac number, because 22012121120201 - 2⁴² = 17614074609097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22012121120201.

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 3 ways as a sum of consecutive naturals, for example, 949032170 + ... + 949055363.

It is an arithmetic number, because the mean of its divisors is an integer number (5503504804833).

Almost surely, 2^{22012121120201} is an apocalyptic number.

It is an amenable number.

22012121120201 is a deficient number, since it is larger than the sum of its proper divisors (1898099131).

22012121120201 is a wasteful number, since it uses less digits than its factorization.

22012121120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898099130.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22012121120201 its reverse (10202112121022), we get a palindrome (32214233241223).

The spelling of 22012121120201 in words is "twenty-two trillion, twelve billion, one hundred twenty-one million, one hundred twenty thousand, two hundred one".