102111212211 has 32 divisors (see below), whose sum is σ = 141091700736. Its totient is φ = 65644992000.

The previous prime is 102111212171. The next prime is 102111212221. The reversal of 102111212211 is 112212111201.

It is a happy number.

It is not a de Polignac number, because 102111212211 - 2²⁶ = 102044103347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102111212221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4221231 + ... + 4245351.

It is an arithmetic number, because the mean of its divisors is an integer number (4409115648).

Almost surely, 2^102111212211 is an apocalyptic number.

102111212211 is a deficient number, since it is larger than the sum of its proper divisors (38980488525).

102111212211 is a wasteful number, since it uses less digits than its factorization.

102111212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24563.

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

Adding to 102111212211 its reverse (112212111201), we get a palindrome (214323323412).

The spelling of 102111212211 in words is "one hundred two billion, one hundred eleven million, two hundred twelve thousand, two hundred eleven".