22002022121 has 4 divisors (see below), whose sum is σ = 22006153092. Its totient is φ = 21997891152.

The previous prime is 22002022051. The next prime is 22002022123. The reversal of 22002022121 is 12122020022.

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 21966500521 + 35521600 = 148211^2 + 5960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22002022121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22002022096 and 22002022105.

It is not an unprimeable number, because it can be changed into a prime (22002022123) 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, 2057486 + ... + 2068151.

It is an arithmetic number, because the mean of its divisors is an integer number (5501538273).

Almost surely, 2^22002022121 is an apocalyptic number.

It is an amenable number.

22002022121 is a deficient number, since it is larger than the sum of its proper divisors (4130971).

22002022121 is an equidigital number, since it uses as much as digits as its factorization.

22002022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4130970.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22002022121 its reverse (12122020022), we get a palindrome (34124042143).

The spelling of 22002022121 in words is "twenty-two billion, two million, twenty-two thousand, one hundred twenty-one".