109212012012 has 12 divisors (see below), whose sum is σ = 254828028056. Its totient is φ = 36404004000.

The previous prime is 109212011893. The next prime is 109212012029. The reversal of 109212012012 is 210210212901.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 109212012012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4550500489 + ... + 4550500512.

Almost surely, 2^109212012012 is an apocalyptic number.

109212012012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

109212012012 is an abundant number, since it is smaller than the sum of its proper divisors (145616016044).

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

109212012012 is a wasteful number, since it uses less digits than its factorization.

109212012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9101001008 (or 9101001006 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 109212012012 its reverse (210210212901), we get a palindrome (319422224913).

The spelling of 109212012012 in words is "one hundred nine billion, two hundred twelve million, twelve thousand, twelve".