20222100021121 has 4 divisors (see below), whose sum is σ = 20255088765652. Its totient is φ = 20189111276592.

The previous prime is 20222100021113. The next prime is 20222100021169. The reversal of 20222100021121 is 12112000122202.

It is a happy number.

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 3122518714225 + 17099581306896 = 1767065^2 + 4135164^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222100021121 - 2³ = 20222100021113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20222100021095 and 20222100021104.

It is not an unprimeable number, because it can be changed into a prime (20222100022121) 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, 16494371346 + ... + 16494372571.

It is an arithmetic number, because the mean of its divisors is an integer number (5063772191413).

Almost surely, 2^{20222100021121} is an apocalyptic number.

It is an amenable number.

20222100021121 is a deficient number, since it is larger than the sum of its proper divisors (32988744531).

20222100021121 is an equidigital number, since it uses as much as digits as its factorization.

20222100021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32988744530.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20222100021121 its reverse (12112000122202), we get a palindrome (32334100143323).

The spelling of 20222100021121 in words is "twenty trillion, two hundred twenty-two billion, one hundred million, twenty-one thousand, one hundred twenty-one".