22002220121 has 16 divisors (see below), whose sum is σ = 25691351040. Its totient is φ = 18449921040.

The previous prime is 22002220109. The next prime is 22002220127. The reversal of 22002220121 is 12102220022.

It is a cyclic number.

It is not a de Polignac number, because 22002220121 - 2¹⁸ = 22001957977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22002220096 and 22002220105.

It is not an unprimeable number, because it can be changed into a prime (22002220127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 835526 + ... + 861456.

It is an arithmetic number, because the mean of its divisors is an integer number (1605709440).

Almost surely, 2^22002220121 is an apocalyptic number.

It is an amenable number.

22002220121 is a deficient number, since it is larger than the sum of its proper divisors (3689130919).

22002220121 is a wasteful number, since it uses less digits than its factorization.

22002220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28564.

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

Adding to 22002220121 its reverse (12102220022), we get a palindrome (34104440143).

Subtracting from 22002220121 its reverse (12102220022), we obtain a palindrome (9900000099).

The spelling of 22002220121 in words is "twenty-two billion, two million, two hundred twenty thousand, one hundred twenty-one".