102121519 has 2 divisors, whose sum is σ = 102121520. Its totient is φ = 102121518.

The previous prime is 102121489. The next prime is 102121531. The reversal of 102121519 is 915121201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102121519 - 2⁷ = 102121391 is a prime.

It is a super-2 number, since 2×102121519² = 20857609285734722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102121519.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102121819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060759 + 51060760.

It is an arithmetic number, because the mean of its divisors is an integer number (51060760).

Almost surely, 2^102121519 is an apocalyptic number.

102121519 is a deficient number, since it is larger than the sum of its proper divisors (1).

102121519 is an equidigital number, since it uses as much as digits as its factorization.

102121519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 102121519 is about 10105.5192345569. The cubic root of 102121519 is about 467.4183471453.

The spelling of 102121519 in words is "one hundred two million, one hundred twenty-one thousand, five hundred nineteen".