124121100400 has 120 divisors (see below), whose sum is σ = 344446217424. Its totient is φ = 42479923200.

The previous prime is 124121100391. The next prime is 124121100401. The reversal of 124121100400 is 4001121421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124121100401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 754887 + ... + 904486.

Almost surely, 2^124121100400 is an apocalyptic number.

124121100400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124121100400 is an abundant number, since it is smaller than the sum of its proper divisors (220325117024).

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

124121100400 is a wasteful number, since it uses less digits than its factorization.

124121100400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659419 (or 1659408 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 124121100400 its reverse (4001121421), we get a palindrome (128122221821).

The spelling of 124121100400 in words is "one hundred twenty-four billion, one hundred twenty-one million, one hundred thousand, four hundred".