20021122001321 has 4 divisors (see below), whose sum is σ = 22881282287232. Its totient is φ = 17160961715412.

The previous prime is 20021122001311. The next prime is 20021122001347. The reversal of 20021122001321 is 12310022112002.

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 a de Polignac number, because none of the positive numbers 2^k-20021122001321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20021122001321.

It is not an unprimeable number, because it can be changed into a prime (20021122001311) 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, 1430080142945 + ... + 1430080142958.

It is an arithmetic number, because the mean of its divisors is an integer number (5720320571808).

Almost surely, 2^{20021122001321} is an apocalyptic number.

It is an amenable number.

20021122001321 is a deficient number, since it is larger than the sum of its proper divisors (2860160285911).

20021122001321 is an equidigital number, since it uses as much as digits as its factorization.

20021122001321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860160285910.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20021122001321 its reverse (12310022112002), we get a palindrome (32331144113323).

The spelling of 20021122001321 in words is "twenty trillion, twenty-one billion, one hundred twenty-two million, one thousand, three hundred twenty-one".