100220111001 has 20 divisors (see below), whose sum is σ = 149749261200. Its totient is φ = 66796565976.

The previous prime is 100220110973. The next prime is 100220111021. The reversal of 100220111001 is 100111022001.

It is a happy number.

It is not a de Polignac number, because 100220111001 - 2¹⁹ = 100219586713 is a prime.

It is a super-2 number, since 2×100220111001² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (100220111021) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 171610 + ... + 479468.

It is an arithmetic number, because the mean of its divisors is an integer number (7487463060).

Almost surely, 2^100220111001 is an apocalyptic number.

It is an amenable number.

100220111001 is a deficient number, since it is larger than the sum of its proper divisors (49529150199).

100220111001 is an equidigital number, since it uses as much as digits as its factorization.

100220111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311890 (or 311881 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 100220111001 its reverse (100111022001), we get a palindrome (200331133002).

The spelling of 100220111001 in words is "one hundred billion, two hundred twenty million, one hundred eleven thousand, one".