123021117 has 6 divisors (see below), whose sum is σ = 177697182. Its totient is φ = 82014072.

The previous prime is 123021097. The next prime is 123021121. The reversal of 123021117 is 711120321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 121418361 + 1602756 = 11019^2 + 1266^2 .

It is not a de Polignac number, because 123021117 - 2⁶ = 123021053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123021117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123021127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6834498 + ... + 6834515.

It is an arithmetic number, because the mean of its divisors is an integer number (29616197).

Almost surely, 2^123021117 is an apocalyptic number.

It is an amenable number.

123021117 is a deficient number, since it is larger than the sum of its proper divisors (54676065).

123021117 is a wasteful number, since it uses less digits than its factorization.

123021117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13669019 (or 13669016 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 123021117 is about 11091.4884934350. The cubic root of 123021117 is about 497.3474420912.

Adding to 123021117 its reverse (711120321), we get a palindrome (834141438).

The spelling of 123021117 in words is "one hundred twenty-three million, twenty-one thousand, one hundred seventeen".