1000121023 has 6 divisors (see below), whose sum is σ = 1099306712. Its totient is φ = 909200820.

The previous prime is 1000120997. The next prime is 1000121041. The reversal of 1000121023 is 3201210001.

It is not a de Polignac number, because 1000121023 - 2⁵ = 1000120991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000121053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4132611 + ... + 4132852.

Almost surely, 2^1000121023 is an apocalyptic number.

1000121023 is a deficient number, since it is larger than the sum of its proper divisors (99185689).

1000121023 is an equidigital number, since it uses as much as digits as its factorization.

1000121023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8265485 (or 8265474 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1000121023 is about 31624.6900854380. The cubic root of 1000121023 is about 1000.0403393727.

Adding to 1000121023 its reverse (3201210001), we get a palindrome (4201331024).

The spelling of 1000121023 in words is "one billion, one hundred twenty-one thousand, twenty-three".