222111221929 has 2 divisors, whose sum is σ = 222111221930. Its totient is φ = 222111221928.

The previous prime is 222111221911. The next prime is 222111222013. The reversal of 222111221929 is 929122111222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216944487529 + 5166734400 = 465773^2 + 71880^2 .

It is a cyclic number.

It is not a de Polignac number, because 222111221929 - 2²⁹ = 221574351017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222111221894 and 222111221903.

It is not a weakly prime, because it can be changed into another prime (222111221029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111055610964 + 111055610965.

It is an arithmetic number, because the mean of its divisors is an integer number (111055610965).

Almost surely, 2^222111221929 is an apocalyptic number.

It is an amenable number.

222111221929 is a deficient number, since it is larger than the sum of its proper divisors (1).

222111221929 is an equidigital number, since it uses as much as digits as its factorization.

222111221929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The spelling of 222111221929 in words is "two hundred twenty-two billion, one hundred eleven million, two hundred twenty-one thousand, nine hundred twenty-nine".