1021002243 has 16 divisors (see below), whose sum is σ = 1372468896. Its totient is φ = 675118080.

The previous prime is 1021002193. The next prime is 1021002247. The reversal of 1021002243 is 3422001201.

It is not a de Polignac number, because 1021002243 - 2⁶ = 1021002179 is a prime.

It is a super-2 number, since 2×1021002243² = 2084891160422062098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1021002247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315373 + ... + 318593.

It is an arithmetic number, because the mean of its divisors is an integer number (85779306).

Almost surely, 2^1021002243 is an apocalyptic number.

1021002243 is a deficient number, since it is larger than the sum of its proper divisors (351466653).

1021002243 is a wasteful number, since it uses less digits than its factorization.

1021002243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1021002243 is about 31953.1257156479. The cubic root of 1021002243 is about 1006.9523011632.

Adding to 1021002243 its reverse (3422001201), we get a palindrome (4443003444).

The spelling of 1021002243 in words is "one billion, twenty-one million, two thousand, two hundred forty-three".