109321020 has 36 divisors (see below), whose sum is σ = 331607640. Its totient is φ = 29152224.

The previous prime is 109320989. The next prime is 109321049. The reversal of 109321020 is 20123901.

It is a happy number.

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 (18).

It is a junction number, because it is equal to n+sod(n) for n = 109320984 and 109321002.

It is a congruent number.

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, 303490 + ... + 303849.

Almost surely, 2^109321020 is an apocalyptic number.

109321020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109321020 is an abundant number, since it is smaller than the sum of its proper divisors (222286620).

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

109321020 is a wasteful number, since it uses less digits than its factorization.

109321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607354 (or 607349 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 109321020 is about 10455.6692755653. The cubic root of 109321020 is about 478.1541084419.

Adding to 109321020 its reverse (20123901), we get a palindrome (129444921).

The spelling of 109321020 in words is "one hundred nine million, three hundred twenty-one thousand, twenty".