2222021251 has 2 divisors, whose sum is σ = 2222021252. Its totient is φ = 2222021250.

The previous prime is 2222021239. The next prime is 2222021257. The reversal of 2222021251 is 1521202222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2222021251 - 2¹¹ = 2222019203 is a prime.

It is not a weakly prime, because it can be changed into another prime (2222021257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111010625 + 1111010626.

It is an arithmetic number, because the mean of its divisors is an integer number (1111010626).

Almost surely, 2^2222021251 is an apocalyptic number.

2222021251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2222021251 is an equidigital number, since it uses as much as digits as its factorization.

2222021251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2222021251 is about 47138.3204091957. The cubic root of 2222021251 is about 1304.9165404169.

Adding to 2222021251 its reverse (1521202222), we get a palindrome (3743223473).

The spelling of 2222021251 in words is "two billion, two hundred twenty-two million, twenty-one thousand, two hundred fifty-one".