106921321 has 8 divisors (see below), whose sum is σ = 115295040. Its totient is φ = 98568912.

The previous prime is 106921301. The next prime is 106921361. The reversal of 106921321 is 123129601.

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

It is not a de Polignac number, because 106921321 - 2¹⁵ = 106888553 is a prime.

It is a super-2 number, since 2×106921321² = 22864337768770082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106921301) 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, 6006 + ... + 15808.

It is an arithmetic number, because the mean of its divisors is an integer number (14411880).

Almost surely, 2^106921321 is an apocalyptic number.

It is an amenable number.

106921321 is a deficient number, since it is larger than the sum of its proper divisors (8373719).

106921321 is an equidigital number, since it uses as much as digits as its factorization.

106921321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10655.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 106921321 is about 10340.2766403999. The cubic root of 106921321 is about 474.6295482795.

The spelling of 106921321 in words is "one hundred six million, nine hundred twenty-one thousand, three hundred twenty-one".