123210203100 has 36 divisors (see below), whose sum is σ = 356488188504. Its totient is φ = 32856054080.

The previous prime is 123210203087. The next prime is 123210203107. The reversal of 123210203100 is 1302012321.

It is a super-2 number, since 2×123210203100² (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 self number, because there is not a number n which added to its sum of digits gives 123210203100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123210203107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205350039 + ... + 205350638.

Almost surely, 2^123210203100 is an apocalyptic number.

123210203100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123210203100 is an abundant number, since it is smaller than the sum of its proper divisors (233277985404).

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

123210203100 is a wasteful number, since it uses less digits than its factorization.

123210203100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410700694 (or 410700687 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 123210203100 its reverse (1302012321), we get a palindrome (124512215421).

The spelling of 123210203100 in words is "one hundred twenty-three billion, two hundred ten million, two hundred three thousand, one hundred".