222121351 has 2 divisors, whose sum is σ = 222121352. Its totient is φ = 222121350.

The previous prime is 222121309. The next prime is 222121369. The reversal of 222121351 is 153121222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222121351 - 2⁷ = 222121223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222121301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060675 + 111060676.

It is an arithmetic number, because the mean of its divisors is an integer number (111060676).

Almost surely, 2^222121351 is an apocalyptic number.

222121351 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121351 is an equidigital number, since it uses as much as digits as its factorization.

222121351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 19.

The square root of 222121351 is about 14903.7361423235. The cubic root of 222121351 is about 605.6152028194.

Adding to 222121351 its reverse (153121222), we get a palindrome (375242573).

The spelling of 222121351 in words is "two hundred twenty-two million, one hundred twenty-one thousand, three hundred fifty-one".