1002113021 has 24 divisors (see below), whose sum is σ = 1264378752. Its totient is φ = 773424000.

The previous prime is 1002113003. The next prime is 1002113039. The reversal of 1002113021 is 1203112001.

It is an interprime number because it is at equal distance from previous prime (1002113003) and next prime (1002113039).

It is not a de Polignac number, because 1002113021 - 2¹⁸ = 1001850877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002112993 and 1002113011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002113051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149696 + ... + 156246.

It is an arithmetic number, because the mean of its divisors is an integer number (52682448).

Almost surely, 2^1002113021 is an apocalyptic number.

It is an amenable number.

1002113021 is a deficient number, since it is larger than the sum of its proper divisors (262265731).

1002113021 is an equidigital number, since it uses as much as digits as its factorization.

1002113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6653 (or 6612 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1002113021 is about 31656.1687669244. The cubic root of 1002113021 is about 1000.7038448196.

Adding to 1002113021 its reverse (1203112001), we get a palindrome (2205225022).

The spelling of 1002113021 in words is "one billion, two million, one hundred thirteen thousand, twenty-one".