22112021202121 has 4 divisors (see below), whose sum is σ = 22112092697872. Its totient is φ = 22111949706372.

The previous prime is 22112021202101. The next prime is 22112021202127. The reversal of 22112021202121 is 12120212021122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22112021202121 - 2⁴³ = 13315928179913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22112021202127) 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, 35281935 + ... + 35903188.

It is an arithmetic number, because the mean of its divisors is an integer number (5528023174468).

Almost surely, 2^{22112021202121} is an apocalyptic number.

It is an amenable number.

22112021202121 is a deficient number, since it is larger than the sum of its proper divisors (71495751).

22112021202121 is an equidigital number, since it uses as much as digits as its factorization.

22112021202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71495750.

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

Adding to 22112021202121 its reverse (12120212021122), we get a palindrome (34232233223243).

The spelling of 22112021202121 in words is "twenty-two trillion, one hundred twelve billion, twenty-one million, two hundred two thousand, one hundred twenty-one".