100403121220 has 24 divisors (see below), whose sum is σ = 210852508608. Its totient is φ = 40160114400.

The previous prime is 100403121193. The next prime is 100403121233. The reversal of 100403121220 is 22121304001.

It is a junction number, because it is equal to n+sod(n) for n = 100403121194 and 100403121203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1341385 + ... + 1414255.

It is an arithmetic number, because the mean of its divisors is an integer number (8785521192).

Almost surely, 2^100403121220 is an apocalyptic number.

100403121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100403121220 is an abundant number, since it is smaller than the sum of its proper divisors (110449387388).

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

100403121220 is a wasteful number, since it uses less digits than its factorization.

100403121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141771 (or 141769 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 100403121220 its reverse (22121304001), we get a palindrome (122524425221).

The spelling of 100403121220 in words is "one hundred billion, four hundred three million, one hundred twenty-one thousand, two hundred twenty".