22110012121 has 4 divisors (see below), whose sum is σ = 22111344144. Its totient is φ = 22108680100.

The previous prime is 22110011971. The next prime is 22110012137. The reversal of 22110012121 is 12121001122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22110012121 - 2¹¹ = 22110010073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22110012151) 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, 640795 + ... + 674416.

It is an arithmetic number, because the mean of its divisors is an integer number (5527836036).

Almost surely, 2^22110012121 is an apocalyptic number.

It is an amenable number.

22110012121 is a deficient number, since it is larger than the sum of its proper divisors (1332023).

22110012121 is a wasteful number, since it uses less digits than its factorization.

22110012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332022.

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

Adding to 22110012121 its reverse (12121001122), we get a palindrome (34231013243).

It can be divided in two parts, 2211001 and 2121, that added together give a palindrome (2213122).

The spelling of 22110012121 in words is "twenty-two billion, one hundred ten million, twelve thousand, one hundred twenty-one".