22112221223921 has 2 divisors, whose sum is σ = 22112221223922. Its totient is φ = 22112221223920.

The previous prime is 22112221223909. The next prime is 22112221223927. The reversal of 22112221223921 is 12932212221122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16569662242225 + 5542558981696 = 4070585^2 + 2354264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22112221223921 is a prime.

It is a super-3 number, since 3×22112221223921³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (22112221223927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11056110611960 + 11056110611961.

It is an arithmetic number, because the mean of its divisors is an integer number (11056110611961).

Almost surely, 2^{22112221223921} is an apocalyptic number.

It is an amenable number.

22112221223921 is a deficient number, since it is larger than the sum of its proper divisors (1).

22112221223921 is an equidigital number, since it uses as much as digits as its factorization.

22112221223921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The spelling of 22112221223921 in words is "twenty-two trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twenty-three thousand, nine hundred twenty-one".