100120020111 has 20 divisors (see below), whose sum is σ = 149649726600. Its totient is φ = 66707531856.

The previous prime is 100120020067. The next prime is 100120020113. The reversal of 100120020111 is 111020021001.

It is a happy number.

It is not a de Polignac number, because 100120020111 - 2¹³ = 100120011919 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 100120020093 and 100120020102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100120020113) 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, 223201 + ... + 500058.

It is an arithmetic number, because the mean of its divisors is an integer number (7482486330).

Almost surely, 2^100120020111 is an apocalyptic number.

100120020111 is a deficient number, since it is larger than the sum of its proper divisors (49529706489).

100120020111 is an equidigital number, since it uses as much as digits as its factorization.

100120020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724980 (or 724971 counting only the distinct ones).

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

Adding to 100120020111 its reverse (111020021001), we get a palindrome (211140041112).

The spelling of 100120020111 in words is "one hundred billion, one hundred twenty million, twenty thousand, one hundred eleven".