109402121 has 8 divisors (see below), whose sum is σ = 110194344. Its totient is φ = 108613120.

The previous prime is 109402109. The next prime is 109402127. The reversal of 109402121 is 121204901.

It can be written as a sum of positive squares in 4 ways, for example, as 19891600 + 89510521 = 4460^2 + 9461^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109402121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 109402093 and 109402102.

It is not an unprimeable number, because it can be changed into a prime (109402127) 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, 143381 + ... + 144141.

It is an arithmetic number, because the mean of its divisors is an integer number (13774293).

Almost surely, 2^109402121 is an apocalyptic number.

It is an amenable number.

109402121 is a deficient number, since it is larger than the sum of its proper divisors (792223).

109402121 is an equidigital number, since it uses as much as digits as its factorization.

109402121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 109402121 is about 10459.5468831111. The cubic root of 109402121 is about 478.2723205076.

The spelling of 109402121 in words is "one hundred nine million, four hundred two thousand, one hundred twenty-one".