102111211111211 has 16 divisors (see below), whose sum is σ = 106425017986560. Its totient is φ = 97903104092640.

The previous prime is 102111211111201. The next prime is 102111211111237. The reversal of 102111211111211 is 112111112111201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 102111211111211 - 2³⁸ = 101836333204267 is a prime.

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 102111211111211.

It is not an unprimeable number, because it can be changed into a prime (102111211111201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89006141 + ... + 90146078.

It is an arithmetic number, because the mean of its divisors is an integer number (6651563624160).

Almost surely, 2^{102111211111211} is an apocalyptic number.

102111211111211 is a deficient number, since it is larger than the sum of its proper divisors (4313806875349).

102111211111211 is a wasteful number, since it uses less digits than its factorization.

102111211111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179152514.

The product of its (nonzero) digits is 8, while the sum is 17.

Adding to 102111211111211 its reverse (112111112111201), we get a palindrome (214222323222412).

The spelling of 102111211111211 in words is "one hundred two trillion, one hundred eleven billion, two hundred eleven million, one hundred eleven thousand, two hundred eleven".