2002131021 has 64 divisors (see below), whose sum is σ = 3166076160. Its totient is φ = 1115678720.

The previous prime is 2002130993. The next prime is 2002131083. The reversal of 2002131021 is 1201312002.

It is not a de Polignac number, because 2002131021 - 2¹⁴ = 2002114637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2002130988 and 2002131006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002131221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8592721 + ... + 8592953.

It is an arithmetic number, because the mean of its divisors is an integer number (49469940).

Almost surely, 2^2002131021 is an apocalyptic number.

It is an amenable number.

2002131021 is a deficient number, since it is larger than the sum of its proper divisors (1163945139).

2002131021 is a wasteful number, since it uses less digits than its factorization.

2002131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2002131021 is about 44745.1787458716. The cubic root of 2002131021 is about 1260.3683774244.

Adding to 2002131021 its reverse (1201312002), we get a palindrome (3203443023).

The spelling of 2002131021 in words is "two billion, two million, one hundred thirty-one thousand, twenty-one".