100111120211220 has 48 divisors (see below), whose sum is σ = 281877120624960. Its totient is φ = 26547157386496.

The previous prime is 100111120211209. The next prime is 100111120211231. The reversal of 100111120211220 is 22112021111001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (100111120211209) and next prime (100111120211231).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 100111120211220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4660655937 + ... + 4660677416.

It is an arithmetic number, because the mean of its divisors is an integer number (5872440013020).

Almost surely, 2^{100111120211220} is an apocalyptic number.

100111120211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100111120211220 is an abundant number, since it is smaller than the sum of its proper divisors (181766000413740).

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

100111120211220 is a wasteful number, since it uses less digits than its factorization.

100111120211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9321333544 (or 9321333542 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 100111120211220 its reverse (22112021111001), we get a palindrome (122223141322221).

The spelling of 100111120211220 in words is "one hundred trillion, one hundred eleven billion, one hundred twenty million, two hundred eleven thousand, two hundred twenty".