1002021200321 has 4 divisors (see below), whose sum is σ = 1002023533872. Its totient is φ = 1002018866772.

The previous prime is 1002021200281. The next prime is 1002021200387. The reversal of 1002021200321 is 1230021202001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1002021200321 - 2¹⁰ = 1002021199297 is a prime.

It is a super-2 number, since 2×1002021200321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002021200296 and 1002021200305.

It is not an unprimeable number, because it can be changed into a prime (1002021200821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315791 + ... + 1450436.

It is an arithmetic number, because the mean of its divisors is an integer number (250505883468).

Almost surely, 2^{1002021200321} is an apocalyptic number.

It is an amenable number.

1002021200321 is a deficient number, since it is larger than the sum of its proper divisors (2333551).

1002021200321 is an equidigital number, since it uses as much as digits as its factorization.

1002021200321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333550.

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

Adding to 1002021200321 its reverse (1230021202001), we get a palindrome (2232042402322).

The spelling of 1002021200321 in words is "one trillion, two billion, twenty-one million, two hundred thousand, three hundred twenty-one".