100021002111 has 12 divisors (see below), whose sum is σ = 152078716920. Its totient is φ = 63171159120.

The previous prime is 100021002097. The next prime is 100021002113. The reversal of 100021002111 is 111200120001.

It is a happy number.

It is not a de Polignac number, because 100021002111 - 2²⁹ = 99484131199 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 = 100021002093 and 100021002102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021002113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 292458900 + ... + 292459241.

It is an arithmetic number, because the mean of its divisors is an integer number (12673226410).

Almost surely, 2^100021002111 is an apocalyptic number.

100021002111 is a deficient number, since it is larger than the sum of its proper divisors (52057714809).

100021002111 is a wasteful number, since it uses less digits than its factorization.

100021002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584918166 (or 584918163 counting only the distinct ones).

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

Adding to 100021002111 its reverse (111200120001), we get a palindrome (211221122112).

The spelling of 100021002111 in words is "one hundred billion, twenty-one million, two thousand, one hundred eleven".