20021311320321 has 16 divisors (see below), whose sum is σ = 28270456574400. Its totient is φ = 12560135467008.

The previous prime is 20021311320313. The next prime is 20021311320359. The reversal of 20021311320321 is 12302311312002.

It is not a de Polignac number, because 20021311320321 - 2³ = 20021311320313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20021311320301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34962411 + ... + 35530448.

It is an arithmetic number, because the mean of its divisors is an integer number (1766903535900).

Almost surely, 2^{20021311320321} is an apocalyptic number.

It is an amenable number.

20021311320321 is a deficient number, since it is larger than the sum of its proper divisors (8249145254079).

20021311320321 is a wasteful number, since it uses less digits than its factorization.

20021311320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70498448.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 20021311320321 its reverse (12302311312002), we get a palindrome (32323622632323).

The spelling of 20021311320321 in words is "twenty trillion, twenty-one billion, three hundred eleven million, three hundred twenty thousand, three hundred twenty-one".