2021001263 has 2 divisors, whose sum is σ = 2021001264. Its totient is φ = 2021001262.

The previous prime is 2021001221. The next prime is 2021001299. The reversal of 2021001263 is 3621001202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021001263 is a prime.

It is a super-2 number, since 2×2021001263² = 8168892210095190338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021003263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010500631 + 1010500632.

It is an arithmetic number, because the mean of its divisors is an integer number (1010500632).

Almost surely, 2^2021001263 is an apocalyptic number.

2021001263 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021001263 is an equidigital number, since it uses as much as digits as its factorization.

2021001263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2021001263 is about 44955.5476331898. The cubic root of 2021001263 is about 1264.3156923160.

Adding to 2021001263 its reverse (3621001202), we get a palindrome (5642002465).

The spelling of 2021001263 in words is "two billion, twenty-one million, one thousand, two hundred sixty-three".