221113102320251 has 2 divisors, whose sum is σ = 221113102320252. Its totient is φ = 221113102320250.

The previous prime is 221113102320233. The next prime is 221113102320259. The reversal of 221113102320251 is 152023201311122.

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-221113102320251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221113102320251.

It is not a weakly prime, because it can be changed into another prime (221113102320259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110556551160125 + 110556551160126.

It is an arithmetic number, because the mean of its divisors is an integer number (110556551160126).

Almost surely, 2^{221113102320251} is an apocalyptic number.

221113102320251 is a deficient number, since it is larger than the sum of its proper divisors (1).

221113102320251 is an equidigital number, since it uses as much as digits as its factorization.

221113102320251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 221113102320251 its reverse (152023201311122), we get a palindrome (373136303631373).

The spelling of 221113102320251 in words is "two hundred twenty-one trillion, one hundred thirteen billion, one hundred two million, three hundred twenty thousand, two hundred fifty-one".