102111102251 has 2 divisors, whose sum is σ = 102111102252. Its totient is φ = 102111102250.

The previous prime is 102111102187. The next prime is 102111102257. The reversal of 102111102251 is 152201111201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102111102251 - 2⁶ = 102111102187 is a prime.

It is not a weakly prime, because it can be changed into another prime (102111102257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51055551125 + 51055551126.

It is an arithmetic number, because the mean of its divisors is an integer number (51055551126).

Almost surely, 2^102111102251 is an apocalyptic number.

102111102251 is a deficient number, since it is larger than the sum of its proper divisors (1).

102111102251 is an equidigital number, since it uses as much as digits as its factorization.

102111102251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 102111102251 its reverse (152201111201), we get a palindrome (254312213452).

The spelling of 102111102251 in words is "one hundred two billion, one hundred eleven million, one hundred two thousand, two hundred fifty-one".