102221111211 has 4 divisors (see below), whose sum is σ = 136294814952. Its totient is φ = 68147407472.

The previous prime is 102221111191. The next prime is 102221111221. The reversal of 102221111211 is 112111122201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102221111211 - 2⁹ = 102221110699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102221111221) 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, 17036851866 + ... + 17036851871.

It is an arithmetic number, because the mean of its divisors is an integer number (34073703738).

Almost surely, 2^102221111211 is an apocalyptic number.

102221111211 is a deficient number, since it is larger than the sum of its proper divisors (34073703741).

102221111211 is an equidigital number, since it uses as much as digits as its factorization.

102221111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34073703740.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 102221111211 its reverse (112111122201), we get a palindrome (214332233412).

The spelling of 102221111211 in words is "one hundred two billion, two hundred twenty-one million, one hundred eleven thousand, two hundred eleven".