100201111121220 has 48 divisors (see below), whose sum is σ = 280573177980480. Its totient is φ = 26719337552256.

The previous prime is 100201111121179. The next prime is 100201111121239. The reversal of 100201111121220 is 22121111102001.

It is a happy number.

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 100201111121220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28273915 + ... + 31619874.

It is an arithmetic number, because the mean of its divisors is an integer number (5845274541260).

Almost surely, 2^{100201111121220} is an apocalyptic number.

100201111121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100201111121220 is an abundant number, since it is smaller than the sum of its proper divisors (180372066859260).

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

100201111121220 is a wasteful number, since it uses less digits than its factorization.

100201111121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59921684 (or 59921682 counting only the distinct ones).

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

Adding to 100201111121220 its reverse (22121111102001), we get a palindrome (122322222223221).

The spelling of 100201111121220 in words is "one hundred trillion, two hundred one billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twenty".