22200222221121 has 32 divisors (see below), whose sum is σ = 33955921133568. Its totient is φ = 12638287679040.

The previous prime is 22200222221113. The next prime is 22200222221161. The reversal of 22200222221121 is 12112222200222.

It is not a de Polignac number, because 22200222221121 - 2³ = 22200222221113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (22200222221161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5480056 + ... + 8627366.

It is an arithmetic number, because the mean of its divisors is an integer number (1061122535424).

Almost surely, 2^{22200222221121} is an apocalyptic number.

22200222221121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22200222221121 is a deficient number, since it is larger than the sum of its proper divisors (11755698912447).

22200222221121 is a wasteful number, since it uses less digits than its factorization.

22200222221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148581.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22200222221121 its reverse (12112222200222), we get a palindrome (34312444421343).

The spelling of 22200222221121 in words is "twenty-two trillion, two hundred billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".