222121396 has 24 divisors (see below), whose sum is σ = 463559040. Its totient is φ = 91055712.

The previous prime is 222121379. The next prime is 222121423. The reversal of 222121396 is 693121222.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171811 + ... + 173098.

It is an arithmetic number, because the mean of its divisors is an integer number (19314960).

Almost surely, 2^222121396 is an apocalyptic number.

It is an amenable number.

222121396 is an abundant number, since it is smaller than the sum of its proper divisors (241437644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222121396 is a wasteful number, since it uses less digits than its factorization.

222121396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344943 (or 344941 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 222121396 is about 14903.7376520120. The cubic root of 222121396 is about 605.6152437170.

The spelling of 222121396 in words is "two hundred twenty-two million, one hundred twenty-one thousand, three hundred ninety-six".