123221099 has 8 divisors (see below), whose sum is σ = 130194000. Its totient is φ = 116296992.

The previous prime is 123221071. The next prime is 123221129. The reversal of 123221099 is 990122321.

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

It is a cyclic number.

It is not a de Polignac number, because 123221099 - 2¹⁶ = 123155563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123221009) 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, 6944 + ... + 17165.

It is an arithmetic number, because the mean of its divisors is an integer number (16274250).

Almost surely, 2^123221099 is an apocalyptic number.

123221099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

123221099 is a deficient number, since it is larger than the sum of its proper divisors (6972901).

123221099 is a wasteful number, since it uses less digits than its factorization.

123221099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24397.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 123221099 is about 11100.4999436962. The cubic root of 123221099 is about 497.6167906745.

The spelling of 123221099 in words is "one hundred twenty-three million, two hundred twenty-one thousand, ninety-nine".