1002002123021 has 8 divisors (see below), whose sum is σ = 1007486830944. Its totient is φ = 996521439760.

The previous prime is 1002002122997. The next prime is 1002002123039. The reversal of 1002002123021 is 1203212002001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002002123021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002002122987 and 1002002123005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002002123051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506195 + ... + 1503408.

It is an arithmetic number, because the mean of its divisors is an integer number (125935853868).

Almost surely, 2^{1002002123021} is an apocalyptic number.

It is an amenable number.

1002002123021 is a deficient number, since it is larger than the sum of its proper divisors (5484707923).

1002002123021 is a wasteful number, since it uses less digits than its factorization.

1002002123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012331.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 1002002123021 its reverse (1203212002001), we get a palindrome (2205214125022).

The spelling of 1002002123021 in words is "one trillion, two billion, two million, one hundred twenty-three thousand, twenty-one".