100121323220 has 48 divisors (see below), whose sum is σ = 214175707200. Its totient is φ = 39303955200.

The previous prime is 100121323147. The next prime is 100121323223. The reversal of 100121323220 is 22323121001.

It is a super-2 number, since 2×100121323220² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121323223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 638591 + ... + 779769.

It is an arithmetic number, because the mean of its divisors is an integer number (4461993900).

Almost surely, 2^100121323220 is an apocalyptic number.

100121323220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121323220 is an abundant number, since it is smaller than the sum of its proper divisors (114054383980).

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

100121323220 is a wasteful number, since it uses less digits than its factorization.

100121323220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141848 (or 141846 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 100121323220 its reverse (22323121001), we get a palindrome (122444444221).

The spelling of 100121323220 in words is "one hundred billion, one hundred twenty-one million, three hundred twenty-three thousand, two hundred twenty".