1002066021 has 24 divisors (see below), whose sum is σ = 1593787104. Its totient is φ = 601630560.

The previous prime is 1002066017. The next prime is 1002066067. The reversal of 1002066021 is 1206602001.

It is a happy number.

1002066021 is a `hidden beast` number, since 1 + 0 + 0 + 2 + 0 + 660 + 2 + 1 = 666.

It is not a de Polignac number, because 1002066021 - 2² = 1002066017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002065985 and 1002066003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002066521) 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, 36706 + ... + 57891.

It is an arithmetic number, because the mean of its divisors is an integer number (66407796).

Almost surely, 2^1002066021 is an apocalyptic number.

1002066021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1002066021 is a deficient number, since it is larger than the sum of its proper divisors (591721083).

1002066021 is a wasteful number, since it uses less digits than its factorization.

1002066021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94721 (or 94718 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1002066021 is about 31655.4264068580. The cubic root of 1002066021 is about 1000.6881999389.

Adding to 1002066021 its reverse (1206602001), we get a palindrome (2208668022).

The spelling of 1002066021 in words is "one billion, two million, sixty-six thousand, twenty-one".