109201819212 has 36 divisors (see below), whose sum is σ = 276176617080. Its totient is φ = 36382318272.

The previous prime is 109201819201. The next prime is 109201819229. The reversal of 109201819212 is 212918102901.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 689262 + ... + 832757.

Almost surely, 2^109201819212 is an apocalyptic number.

109201819212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

109201819212 is an abundant number, since it is smaller than the sum of its proper divisors (166974797868).

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

109201819212 is a wasteful number, since it uses less digits than its factorization.

109201819212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524022 (or 1524017 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

It can be divided in two parts, 109201819 and 212, that added together give a triangular number (109202031 = T₁₄₇₇₈).

The spelling of 109201819212 in words is "one hundred nine billion, two hundred one million, eight hundred nineteen thousand, two hundred twelve".