1002020111321 has 4 divisors (see below), whose sum is σ = 1002610578612. Its totient is φ = 1001429644032.

The previous prime is 1002020111317. The next prime is 1002020111329. The reversal of 1002020111321 is 1231110202001.

1002020111321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 807661690000 + 194358421321 = 898700^2 + 440861^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002020111321 - 2² = 1002020111317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002020111296 and 1002020111305.

It is not an unprimeable number, because it can be changed into a prime (1002020111329) 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, 295231100 + ... + 295234493.

It is an arithmetic number, because the mean of its divisors is an integer number (250652644653).

Almost surely, 2^{1002020111321} is an apocalyptic number.

It is an amenable number.

1002020111321 is a deficient number, since it is larger than the sum of its proper divisors (590467291).

1002020111321 is an equidigital number, since it uses as much as digits as its factorization.

1002020111321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590467290.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1002020111321 its reverse (1231110202001), we get a palindrome (2233130313322).

The spelling of 1002020111321 in words is "one trillion, two billion, twenty million, one hundred eleven thousand, three hundred twenty-one".