103121400 has 48 divisors (see below), whose sum is σ = 319678200. Its totient is φ = 27498880.

The previous prime is 103121393. The next prime is 103121401. The reversal of 103121400 is 4121301.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103121401) 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, 85335 + ... + 86534.

Almost surely, 2^103121400 is an apocalyptic number.

103121400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103121400 is an abundant number, since it is smaller than the sum of its proper divisors (216556800).

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

103121400 is a wasteful number, since it uses less digits than its factorization.

103121400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171888 (or 171879 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 103121400 is about 10154.8707525010. The cubic root of 103121400 is about 468.9389069711.

Adding to 103121400 its reverse (4121301), we get a palindrome (107242701).

Subtracting from 103121400 its reverse (4121301), we obtain a palindrome (99000099).

The spelling of 103121400 in words is "one hundred three million, one hundred twenty-one thousand, four hundred".