102212211091 has 4 divisors (see below), whose sum is σ = 102279325032. Its totient is φ = 102145097152.

The previous prime is 102212211089. The next prime is 102212211217. The reversal of 102212211091 is 190112212201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190112212201 = 66089 ⋅2876609.

It is a cyclic number.

It is not a de Polignac number, because 102212211091 - 2¹ = 102212211089 is a prime.

It is a super-2 number, since 2×102212211091² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102212211011) 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, 33554686 + ... + 33557731.

It is an arithmetic number, because the mean of its divisors is an integer number (25569831258).

Almost surely, 2^102212211091 is an apocalyptic number.

102212211091 is a deficient number, since it is larger than the sum of its proper divisors (67113941).

102212211091 is an equidigital number, since it uses as much as digits as its factorization.

102212211091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67113940.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 102212211091 its reverse (190112212201), we get a palindrome (292324423292).

The spelling of 102212211091 in words is "one hundred two billion, two hundred twelve million, two hundred eleven thousand, ninety-one".