1010023921 has 2 divisors, whose sum is σ = 1010023922. Its totient is φ = 1010023920.

The previous prime is 1010023913. The next prime is 1010023957. The reversal of 1010023921 is 1293200101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 677873296 + 332150625 = 26036^2 + 18225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010023921 - 2³ = 1010023913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1010023961) 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 as a sum of consecutive naturals, namely, 505011960 + 505011961.

It is an arithmetic number, because the mean of its divisors is an integer number (505011961).

Almost surely, 2^1010023921 is an apocalyptic number.

It is an amenable number.

1010023921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010023921 is an equidigital number, since it uses as much as digits as its factorization.

1010023921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1010023921 is about 31780.8735090778. The cubic root of 1010023921 is about 1003.3302044275.

The spelling of 1010023921 in words is "one billion, ten million, twenty-three thousand, nine hundred twenty-one".