1030202021 has 4 divisors (see below), whose sum is σ = 1084423200. Its totient is φ = 975980844.

The previous prime is 1030202011. The next prime is 1030202077. The reversal of 1030202021 is 1202020301.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1030202021 is a prime.

It is a super-2 number, since 2×1030202021² = 2122632408144968882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1030201993 and 1030202011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1030202011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27110561 + ... + 27110598.

It is an arithmetic number, because the mean of its divisors is an integer number (271105800).

Almost surely, 2^1030202021 is an apocalyptic number.

It is an amenable number.

1030202021 is a deficient number, since it is larger than the sum of its proper divisors (54221179).

1030202021 is an equidigital number, since it uses as much as digits as its factorization.

1030202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54221178.

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

The square root of 1030202021 is about 32096.7602882285. The cubic root of 1030202021 is about 1009.9676560567.

Adding to 1030202021 its reverse (1202020301), we get a palindrome (2232222322).

The spelling of 1030202021 in words is "one billion, thirty million, two hundred two thousand, twenty-one".