100100121222220 has 72 divisors (see below), whose sum is σ = 245460069749664. Its totient is φ = 34189547019264.

The previous prime is 100100121222169. The next prime is 100100121222221. The reversal of 100100121222220 is 22222121001001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 100100121222194 and 100100121222203.

It is not an unprimeable number, because it can be changed into a prime (100100121222221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193930437 + ... + 194445916.

It is an arithmetic number, because the mean of its divisors is an integer number (3409167635412).

Almost surely, 2^{100100121222220} is an apocalyptic number.

100100121222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100100121222220 is an abundant number, since it is smaller than the sum of its proper divisors (145359948527444).

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

100100121222220 is a wasteful number, since it uses less digits than its factorization.

100100121222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388376639 (or 388376630 counting only the distinct ones).

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

Adding to 100100121222220 its reverse (22222121001001), we get a palindrome (122322242223221).

The spelling of 100100121222220 in words is "one hundred trillion, one hundred billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty".