102001023 has 6 divisors (see below), whose sum is σ = 147334824. Its totient is φ = 68000676.

The previous prime is 102001007. The next prime is 102001027. The reversal of 102001023 is 320100201.

It is a happy number.

It is not a de Polignac number, because 102001023 - 2⁴ = 102001007 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: 11333447 = 102001023 / (1 + 0 + 2 + 0 + 0 + 1 + 0 + 2 + 3).

It is a junction number, because it is equal to n+sod(n) for n = 102000996 and 102001014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102001027) 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, 5666715 + ... + 5666732.

It is an arithmetic number, because the mean of its divisors is an integer number (24555804).

Almost surely, 2^102001023 is an apocalyptic number.

102001023 is a deficient number, since it is larger than the sum of its proper divisors (45333801).

102001023 is a wasteful number, since it uses less digits than its factorization.

102001023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11333453 (or 11333450 counting only the distinct ones).

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

The square root of 102001023 is about 10099.5555842819. Note that the first 4 decimals coincide. The cubic root of 102001023 is about 467.2344348539.

Adding to 102001023 its reverse (320100201), we get a palindrome (422101224).

The spelling of 102001023 in words is "one hundred two million, one thousand, twenty-three".