100121125420 has 24 divisors (see below), whose sum is σ = 210342694464. Its totient is φ = 40031625216.

The previous prime is 100121125397. The next prime is 100121125441. The reversal of 100121125420 is 24521121001.

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, 1002709 + ... + 1098028.

It is an arithmetic number, because the mean of its divisors is an integer number (8764278936).

Almost surely, 2^100121125420 is an apocalyptic number.

100121125420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121125420 is an abundant number, since it is smaller than the sum of its proper divisors (110221569044).

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

100121125420 is a wasteful number, since it uses less digits than its factorization.

100121125420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103129 (or 2103127 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 100121125420 its reverse (24521121001), we get a palindrome (124642246421).

The spelling of 100121125420 in words is "one hundred billion, one hundred twenty-one million, one hundred twenty-five thousand, four hundred twenty".