109218921910 has 24 divisors (see below), whose sum is σ = 228691049760. Its totient is φ = 37446487344.

The previous prime is 109218921907. The next prime is 109218921913. The reversal of 109218921910 is 19129812901.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (109218921907) and next prime (109218921913).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109218921913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111447390 + ... + 111448369.

It is an arithmetic number, because the mean of its divisors is an integer number (9528793740).

Almost surely, 2^109218921910 is an apocalyptic number.

109218921910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109218921910 is an abundant number, since it is smaller than the sum of its proper divisors (119472127850).

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

109218921910 is a wasteful number, since it uses less digits than its factorization.

109218921910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222895780 (or 222895773 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 43.

The spelling of 109218921910 in words is "one hundred nine billion, two hundred eighteen million, nine hundred twenty-one thousand, nine hundred ten".