2002101021 has 12 divisors (see below), whose sum is σ = 2892695520. Its totient is φ = 1334377800.

The previous prime is 2002101019. The next prime is 2002101071. The reversal of 2002101021 is 1201012002.

It is not a de Polignac number, because 2002101021 - 2¹ = 2002101019 is a prime.

It is a super-3 number, since 3×2002101021³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2002100994 and 2002101012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002101071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8496 + ... + 63846.

It is an arithmetic number, because the mean of its divisors is an integer number (241057960).

Almost surely, 2^2002101021 is an apocalyptic number.

It is an amenable number.

2002101021 is a deficient number, since it is larger than the sum of its proper divisors (890594499).

2002101021 is a wasteful number, since it uses less digits than its factorization.

2002101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59376 (or 59373 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2002101021 is about 44744.8435129681. The cubic root of 2002101021 is about 1260.3620822586.

Adding to 2002101021 its reverse (1201012002), we get a palindrome (3203113023).

The spelling of 2002101021 in words is "two billion, two million, one hundred one thousand, twenty-one".