123212323100 has 18 divisors (see below), whose sum is σ = 267370741344. Its totient is φ = 49284929200.

The previous prime is 123212323093. The next prime is 123212323103. The reversal of 123212323100 is 1323212321.

It is a super-2 number, since 2×123212323100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123212323103) 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, 616061516 + ... + 616061715.

Almost surely, 2^123212323100 is an apocalyptic number.

123212323100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123212323100 is an abundant number, since it is smaller than the sum of its proper divisors (144158418244).

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

123212323100 is a wasteful number, since it uses less digits than its factorization.

123212323100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232123245 (or 1232123238 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 123212323100 its reverse (1323212321), we get a palindrome (124535535421).

The spelling of 123212323100 in words is "one hundred twenty-three billion, two hundred twelve million, three hundred twenty-three thousand, one hundred".