1002000122021 has 8 divisors (see below), whose sum is σ = 1011059470080. Its totient is φ = 992944144192.

The previous prime is 1002000121943. The next prime is 1002000122059. The reversal of 1002000122021 is 1202210002001.

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-1002000122021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002000121993 and 1002000122011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002000121021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243335 + ... + 1436388.

It is an arithmetic number, because the mean of its divisors is an integer number (126382433760).

Almost surely, 2^{1002000122021} is an apocalyptic number.

It is an amenable number.

1002000122021 is a deficient number, since it is larger than the sum of its proper divisors (9059348059).

1002000122021 is a wasteful number, since it uses less digits than its factorization.

1002000122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685115.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1002000122021 its reverse (1202210002001), we get a palindrome (2204210124022).

The spelling of 1002000122021 in words is "one trillion, two billion, one hundred twenty-two thousand, twenty-one".