100121311220 has 24 divisors (see below), whose sum is σ = 240291147264. Its totient is φ = 34327306656.

The previous prime is 100121311207. The next prime is 100121311253. The reversal of 100121311220 is 22113121001.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 100121311195 and 100121311204.

It is a congruent number.

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, 357575972 + ... + 357576251.

It is an arithmetic number, because the mean of its divisors is an integer number (10012131136).

Almost surely, 2^100121311220 is an apocalyptic number.

100121311220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121311220 is an abundant number, since it is smaller than the sum of its proper divisors (140169836044).

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

100121311220 is a wasteful number, since it uses less digits than its factorization.

100121311220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715152239 (or 715152237 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 100121311220 its reverse (22113121001), we get a palindrome (122234432221).

The spelling of 100121311220 in words is "one hundred billion, one hundred twenty-one million, three hundred eleven thousand, two hundred twenty".