20311032100321 has 4 divisors (see below), whose sum is σ = 20311718058544. Its totient is φ = 20310346142100.

The previous prime is 20311032100319. The next prime is 20311032100343. The reversal of 20311032100321 is 12300123011302.

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 20311032100321 - 2¹ = 20311032100319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20311032100421) 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, 342934695 + ... + 342993916.

It is an arithmetic number, because the mean of its divisors is an integer number (5077929514636).

Almost surely, 2^{20311032100321} is an apocalyptic number.

It is an amenable number.

20311032100321 is a deficient number, since it is larger than the sum of its proper divisors (685958223).

20311032100321 is an equidigital number, since it uses as much as digits as its factorization.

20311032100321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685958222.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20311032100321 its reverse (12300123011302), we get a palindrome (32611155111623).

The spelling of 20311032100321 in words is "twenty trillion, three hundred eleven billion, thirty-two million, one hundred thousand, three hundred twenty-one".