22020001012121 has 4 divisors (see below), whose sum is σ = 25165715442432. Its totient is φ = 18874286581812.

The previous prime is 22020001012117. The next prime is 22020001012123. The reversal of 22020001012121 is 12121010002022.

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 22020001012121 - 2² = 22020001012117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22020001012096 and 22020001012105.

It is not an unprimeable number, because it can be changed into a prime (22020001012123) 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, 1572857215145 + ... + 1572857215158.

It is an arithmetic number, because the mean of its divisors is an integer number (6291428860608).

Almost surely, 2^{22020001012121} is an apocalyptic number.

It is an amenable number.

22020001012121 is a deficient number, since it is larger than the sum of its proper divisors (3145714430311).

22020001012121 is an equidigital number, since it uses as much as digits as its factorization.

22020001012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145714430310.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22020001012121 its reverse (12121010002022), we get a palindrome (34141011014143).

The spelling of 22020001012121 in words is "twenty-two trillion, twenty billion, one million, twelve thousand, one hundred twenty-one".