123111123000 has 64 divisors (see below), whose sum is σ = 384106713120. Its totient is φ = 32829632000.

The previous prime is 123111122993. The next prime is 123111123133. The reversal of 123111123000 is 321111321.

It is a happy number.

It is a super-2 number, since 2×123111123000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20515521 + ... + 20521520.

Almost surely, 2^123111123000 is an apocalyptic number.

123111123000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123111123000 is an abundant number, since it is smaller than the sum of its proper divisors (260995590120).

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

123111123000 is a wasteful number, since it uses less digits than its factorization.

123111123000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41037065 (or 41037051 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 123111123000 its reverse (321111321), we get a palindrome (123432234321).

It can be divided in two parts, 12311 and 1123000, that added together give a palindrome (1135311).

The spelling of 123111123000 in words is "one hundred twenty-three billion, one hundred eleven million, one hundred twenty-three thousand".