102919121 has 2 divisors, whose sum is σ = 102919122. Its totient is φ = 102919120.

The previous prime is 102919109. The next prime is 102919147. The reversal of 102919121 is 121919201.

It is an a-pointer prime, because the next prime (102919147) can be obtained adding 102919121 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102738496 + 180625 = 10136^2 + 425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102919121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102919151) 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, 51459560 + 51459561.

It is an arithmetic number, because the mean of its divisors is an integer number (51459561).

Almost surely, 2^102919121 is an apocalyptic number.

It is an amenable number.

102919121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102919121 is an equidigital number, since it uses as much as digits as its factorization.

102919121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 102919121 is about 10144.9061602363. The cubic root of 102919121 is about 468.6320887189.

The spelling of 102919121 in words is "one hundred two million, nine hundred nineteen thousand, one hundred twenty-one".