22021121121 has 8 divisors (see below), whose sum is σ = 29431238784. Its totient is φ = 14645875440.

The previous prime is 22021121107. The next prime is 22021121123. The reversal of 22021121121 is 12112112022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22021121121 - 2¹³ = 22021112929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22021121121.

It is not an unprimeable number, because it can be changed into a prime (22021121123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8716521 + ... + 8719046.

It is an arithmetic number, because the mean of its divisors is an integer number (3678904848).

Almost surely, 2^22021121121 is an apocalyptic number.

It is an amenable number.

22021121121 is a deficient number, since it is larger than the sum of its proper divisors (7410117663).

22021121121 is a wasteful number, since it uses less digits than its factorization.

22021121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17435991.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22021121121 its reverse (12112112022), we get a palindrome (34133233143).

Subtracting from 22021121121 its reverse (12112112022), we obtain a palindrome (9909009099).

The spelling of 22021121121 in words is "twenty-two billion, twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".