22202121421 has 4 divisors (see below), whose sum is σ = 23167431072. Its totient is φ = 21236811772.

The previous prime is 22202121419. The next prime is 22202121427. The reversal of 22202121421 is 12412120222.

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 22202121421 - 2¹ = 22202121419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22202121427) 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, 482654791 + ... + 482654836.

It is an arithmetic number, because the mean of its divisors is an integer number (5791857768).

Almost surely, 2^22202121421 is an apocalyptic number.

It is an amenable number.

22202121421 is a deficient number, since it is larger than the sum of its proper divisors (965309651).

22202121421 is an equidigital number, since it uses as much as digits as its factorization.

22202121421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965309650.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22202121421 its reverse (12412120222), we get a palindrome (34614241643).

The spelling of 22202121421 in words is "twenty-two billion, two hundred two million, one hundred twenty-one thousand, four hundred twenty-one".