102212211209 has 4 divisors (see below), whose sum is σ = 106656220416. Its totient is φ = 97768202004.

The previous prime is 102212211089. The next prime is 102212211217. The reversal of 102212211209 is 902112212201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102212211209 - 2⁸ = 102212210953 is a prime.

It is a super-2 number, since 2×102212211209² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 4444009183 = 102212211209 / (1 + 0 + 2 + 2 + 1 + 2 + 2 + 1 + 1 + 2 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102212211809) 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, 2222004569 + ... + 2222004614.

It is an arithmetic number, because the mean of its divisors is an integer number (26664055104).

Almost surely, 2^102212211209 is an apocalyptic number.

It is an amenable number.

102212211209 is a deficient number, since it is larger than the sum of its proper divisors (4444009207).

102212211209 is an equidigital number, since it uses as much as digits as its factorization.

102212211209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4444009206.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 102212211209 in words is "one hundred two billion, two hundred twelve million, two hundred eleven thousand, two hundred nine".