102221219 has 4 divisors (see below), whose sum is σ = 103275144. Its totient is φ = 101167296.

The previous prime is 102221213. The next prime is 102221237. The reversal of 102221219 is 912122201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912122201 = 23 ⋅39657487.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102221219 is a prime.

It is a super-2 number, since 2×102221219² = 20898355227691922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102221219.

It is not an unprimeable number, because it can be changed into a prime (102221213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526817 + ... + 527010.

It is an arithmetic number, because the mean of its divisors is an integer number (25818786).

Almost surely, 2^102221219 is an apocalyptic number.

102221219 is a deficient number, since it is larger than the sum of its proper divisors (1053925).

102221219 is an equidigital number, since it uses as much as digits as its factorization.

102221219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053924.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 102221219 is about 10110.4509790612. The cubic root of 102221219 is about 467.5704092910.

It can be divided in two parts, 1022212 and 19, that multiplied together give a triangular number (19422028 = T₆₂₃₂).

The spelling of 102221219 in words is "one hundred two million, two hundred twenty-one thousand, two hundred nineteen".