22101021121 has 4 divisors (see below), whose sum is σ = 22102217172. Its totient is φ = 22099825072.

The previous prime is 22101021113. The next prime is 22101021169. The reversal of 22101021121 is 12112010122.

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 16630939521 + 5470081600 = 128961^2 + 73960^2 .

It is a cyclic number.

It is not a de Polignac number, because 22101021121 - 2³ = 22101021113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22101021101) 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, 569866 + ... + 607411.

It is an arithmetic number, because the mean of its divisors is an integer number (5525554293).

Almost surely, 2^22101021121 is an apocalyptic number.

It is an amenable number.

22101021121 is a deficient number, since it is larger than the sum of its proper divisors (1196051).

22101021121 is a wasteful number, since it uses less digits than its factorization.

22101021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196050.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22101021121 its reverse (12112010122), we get a palindrome (34213031243).

The spelling of 22101021121 in words is "twenty-two billion, one hundred one million, twenty-one thousand, one hundred twenty-one".