121103123100 has 288 divisors, whose sum is σ = 370018150656. Its totient is φ = 30549657600.

The previous prime is 121103123087. The next prime is 121103123147. The reversal of 121103123100 is 1321301121.

It is a happy number.

It is a super-2 number, since 2×121103123100² (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 121103123100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 52721152 + ... + 52723448.

Almost surely, 2^121103123100 is an apocalyptic number.

121103123100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121103123100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185009075328).

121103123100 is an abundant number, since it is smaller than the sum of its proper divisors (248915027556).

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

121103123100 is a wasteful number, since it uses less digits than its factorization.

121103123100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2485 (or 2478 counting only the distinct ones).

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

Adding to 121103123100 its reverse (1321301121), we get a palindrome (122424424221).

The spelling of 121103123100 in words is "one hundred twenty-one billion, one hundred three million, one hundred twenty-three thousand, one hundred".