222212021222251 has 2 divisors, whose sum is σ = 222212021222252. Its totient is φ = 222212021222250.

The previous prime is 222212021222203. The next prime is 222212021222297. The reversal of 222212021222251 is 152222120212222.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222212021222251 is a prime.

It is a super-3 number, since 3×222212021222251³ (a number of 44 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (222212021222651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111106010611125 + 111106010611126.

It is an arithmetic number, because the mean of its divisors is an integer number (111106010611126).

Almost surely, 2^{222212021222251} is an apocalyptic number.

222212021222251 is a deficient number, since it is larger than the sum of its proper divisors (1).

222212021222251 is an equidigital number, since it uses as much as digits as its factorization.

222212021222251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 222212021222251 its reverse (152222120212222), we get a palindrome (374434141434473).

The spelling of 222212021222251 in words is "two hundred twenty-two trillion, two hundred twelve billion, twenty-one million, two hundred twenty-two thousand, two hundred fifty-one".