102131219 has 2 divisors, whose sum is σ = 102131220. Its totient is φ = 102131218.

The previous prime is 102131209. The next prime is 102131231. The reversal of 102131219 is 912131201.

It is a weak prime.

It is an emirp because it is prime and its reverse (912131201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102131219 - 2¹⁶ = 102065683 is a prime.

It is a super-2 number, since 2×102131219² = 20861571788851922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102131219.

It is not a weakly prime, because it can be changed into another prime (102131209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51065609 + 51065610.

It is an arithmetic number, because the mean of its divisors is an integer number (51065610).

Almost surely, 2^102131219 is an apocalyptic number.

102131219 is a deficient number, since it is larger than the sum of its proper divisors (1).

102131219 is an equidigital number, since it uses as much as digits as its factorization.

102131219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 102131219 is about 10105.9991589155. Note that the first 3 decimals coincide. The cubic root of 102131219 is about 467.4331459016.

The spelling of 102131219 in words is "one hundred two million, one hundred thirty-one thousand, two hundred nineteen".