1020100023 has 6 divisors (see below), whose sum is σ = 1473477824. Its totient is φ = 680066676.

The previous prime is 1020100021. The next prime is 1020100033. The reversal of 1020100023 is 3200010201.

It is a happy number.

It is not a de Polignac number, because 1020100023 - 2¹ = 1020100021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 113344447 = 1020100023 / (1 + 0 + 2 + 0 + 1 + 0 + 0 + 0 + 2 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020099978 and 1020100014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020100021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56672215 + ... + 56672232.

Almost surely, 2^1020100023 is an apocalyptic number.

1020100023 is a deficient number, since it is larger than the sum of its proper divisors (453377801).

1020100023 is a wasteful number, since it uses less digits than its factorization.

1020100023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113344453 (or 113344450 counting only the distinct ones).

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

The square root of 1020100023 is about 31939.0047277619. The cubic root of 1020100023 is about 1006.6556122177.

Adding to 1020100023 its reverse (3200010201), we get a palindrome (4220110224).

The spelling of 1020100023 in words is "one billion, twenty million, one hundred thousand, twenty-three".