1000202123 has 18 divisors (see below), whose sum is σ = 1121479596. Its totient is φ = 891728064.

The previous prime is 1000202113. The next prime is 1000202149. The reversal of 1000202123 is 3212020001.

It is a happy number.

It is not a de Polignac number, because 1000202123 - 2⁴ = 1000202107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1000202113) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 99536 + ... + 109122.

It is an arithmetic number, because the mean of its divisors is an integer number (62304422).

Almost surely, 2^1000202123 is an apocalyptic number.

1000202123 is a deficient number, since it is larger than the sum of its proper divisors (121277473).

1000202123 is an equidigital number, since it uses as much as digits as its factorization.

1000202123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9659 (or 9623 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1000202123 is about 31625.9722854492. The cubic root of 1000202123 is about 1000.0673697945.

Adding to 1000202123 its reverse (3212020001), we get a palindrome (4212222124).

The spelling of 1000202123 in words is "one billion, two hundred two thousand, one hundred twenty-three".