109111202120 has 32 divisors (see below), whose sum is σ = 245528289720. Its totient is φ = 43639488000.

The previous prime is 109111202117. The next prime is 109111202129. The reversal of 109111202120 is 21202111901.

It can be written as a sum of positive squares in 4 ways, for example, as 95667727204 + 13443474916 = 309302^2 + 115946^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 109111202092 and 109111202101.

It is not an unprimeable number, because it can be changed into a prime (109111202129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208514 + ... + 511566.

Almost surely, 2^109111202120 is an apocalyptic number.

109111202120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109111202120 is an abundant number, since it is smaller than the sum of its proper divisors (136417087600).

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

109111202120 is a wasteful number, since it uses less digits than its factorization.

109111202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312065 (or 312061 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 109111202120 in words is "one hundred nine billion, one hundred eleven million, two hundred two thousand, one hundred twenty".