102111221212 has 48 divisors (see below), whose sum is σ = 239925676032. Its totient is φ = 36723314880.

The previous prime is 102111221077. The next prime is 102111221221. The reversal of 102111221212 is 212122111201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12747148 + ... + 12755155.

It is an arithmetic number, because the mean of its divisors is an integer number (4998451584).

Almost surely, 2^102111221212 is an apocalyptic number.

It is an amenable number.

102111221212 is an abundant number, since it is smaller than the sum of its proper divisors (137814454820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102111221212 is a wasteful number, since it uses less digits than its factorization.

102111221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25502338 (or 25502336 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102111221212 its reverse (212122111201), we get a palindrome (314233332413).

It can be divided in two parts, 102111 and 221212, that added together give a palindrome (323323).

The spelling of 102111221212 in words is "one hundred two billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twelve".