222021129 has 32 divisors (see below), whose sum is σ = 337530240. Its totient is φ = 128576000.

The previous prime is 222021113. The next prime is 222021131. The reversal of 222021129 is 921120222.

It is a happy number.

222021129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 222021129 - 2⁴ = 222021113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222021199) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95509 + ... + 97805.

It is an arithmetic number, because the mean of its divisors is an integer number (10547820).

Almost surely, 2^222021129 is an apocalyptic number.

222021129 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

222021129 is a deficient number, since it is larger than the sum of its proper divisors (115509111).

222021129 is a wasteful number, since it uses less digits than its factorization.

222021129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 222021129 is about 14900.3734516958. The cubic root of 222021129 is about 605.5241038209.

The spelling of 222021129 in words is "two hundred twenty-two million, twenty-one thousand, one hundred twenty-nine".