100000021023 has 96 divisors (see below), whose sum is σ = 182546058240. Its totient is φ = 51485575680.

The previous prime is 100000021021. The next prime is 100000021031. The reversal of 100000021023 is 320120000001.

It is a happy number.

It is not a de Polignac number, because 100000021023 - 2¹ = 100000021021 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 = 100000020996 and 100000021014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100000021021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1693840 + ... + 1751882.

It is an arithmetic number, because the mean of its divisors is an integer number (1901521440).

Almost surely, 2^100000021023 is an apocalyptic number.

100000021023 is a deficient number, since it is larger than the sum of its proper divisors (82546037217).

100000021023 is a wasteful number, since it uses less digits than its factorization.

100000021023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58149 (or 58146 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 100000021023 its reverse (320120000001), we get a palindrome (420120021024).

The spelling of 100000021023 in words is "one hundred billion, twenty-one thousand, twenty-three".