222121413 has 8 divisors (see below), whose sum is σ = 329068800. Its totient is φ = 148080924.

The previous prime is 222121379. The next prime is 222121423. The reversal of 222121413 is 314121222.

It is a happy number.

It is not a de Polignac number, because 222121413 - 2¹⁰ = 222120389 is a prime.

It is a super-2 number, since 2×222121413² = 98675844226233138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4113333 + ... + 4113386.

It is an arithmetic number, because the mean of its divisors is an integer number (41133600).

Almost surely, 2^222121413 is an apocalyptic number.

It is an amenable number.

222121413 is a deficient number, since it is larger than the sum of its proper divisors (106947387).

222121413 is an equidigital number, since it uses as much as digits as its factorization.

222121413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8226728 (or 8226722 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 222121413 is about 14903.7382223387. The cubic root of 222121413 is about 605.6152591672.

Adding to 222121413 its reverse (314121222), we get a palindrome (536242635).

The spelling of 222121413 in words is "two hundred twenty-two million, one hundred twenty-one thousand, four hundred thirteen".