1000023121 has 2 divisors, whose sum is σ = 1000023122. Its totient is φ = 1000023120.

The previous prime is 1000023109. The next prime is 1000023139. The reversal of 1000023121 is 1213200001.

1000023121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 695904400 + 304118721 = 26380^2 + 17439^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000023121 - 2⁹ = 1000022609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000023098 and 1000023107.

It is not a weakly prime, because it can be changed into another prime (1000023151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500011560 + 500011561.

It is an arithmetic number, because the mean of its divisors is an integer number (500011561).

Almost surely, 2^1000023121 is an apocalyptic number.

It is an amenable number.

1000023121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000023121 is an equidigital number, since it uses as much as digits as its factorization.

1000023121 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1000023121 is about 31623.1421746796. The cubic root of 1000023121 is about 1000.0077069406.

Adding to 1000023121 its reverse (1213200001), we get a palindrome (2213223122).

The spelling of 1000023121 in words is "one billion, twenty-three thousand, one hundred twenty-one".