102220121951 has 2 divisors, whose sum is σ = 102220121952. Its totient is φ = 102220121950.

The previous prime is 102220121909. The next prime is 102220122041. The reversal of 102220121951 is 159121022201.

It is a weak prime.

It is an emirp because it is prime and its reverse (159121022201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102220121951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102220121951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102220121051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51110060975 + 51110060976.

It is an arithmetic number, because the mean of its divisors is an integer number (51110060976).

Almost surely, 2^102220121951 is an apocalyptic number.

102220121951 is a deficient number, since it is larger than the sum of its proper divisors (1).

102220121951 is an equidigital number, since it uses as much as digits as its factorization.

102220121951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 26.

The spelling of 102220121951 in words is "one hundred two billion, two hundred twenty million, one hundred twenty-one thousand, nine hundred fifty-one".