2221211202251 has 2 divisors, whose sum is σ = 2221211202252. Its totient is φ = 2221211202250.

The previous prime is 2221211202173. The next prime is 2221211202281. The reversal of 2221211202251 is 1522021121222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221211202251 - 2¹⁰ = 2221211201227 is a prime.

It is a super-3 number, since 3×2221211202251³ (a number of 38 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2221211202281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110605601125 + 1110605601126.

It is an arithmetic number, because the mean of its divisors is an integer number (1110605601126).

Almost surely, 2^{2221211202251} is an apocalyptic number.

2221211202251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221211202251 is an equidigital number, since it uses as much as digits as its factorization.

2221211202251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 2221211202251 its reverse (1522021121222), we get a palindrome (3743232323473).

The spelling of 2221211202251 in words is "two trillion, two hundred twenty-one billion, two hundred eleven million, two hundred two thousand, two hundred fifty-one".