20032123220321 has 4 divisors (see below), whose sum is σ = 20226609853632. Its totient is φ = 19837636587012.

The previous prime is 20032123220303. The next prime is 20032123220323. The reversal of 20032123220321 is 12302232123002.

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 20032123220321 - 2⁴² = 15634076709217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20032123220323) 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, 97243316501 + ... + 97243316706.

It is an arithmetic number, because the mean of its divisors is an integer number (5056652463408).

Almost surely, 2^{20032123220321} is an apocalyptic number.

It is an amenable number.

20032123220321 is a deficient number, since it is larger than the sum of its proper divisors (194486633311).

20032123220321 is a wasteful number, since it uses less digits than its factorization.

20032123220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194486633310.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20032123220321 its reverse (12302232123002), we get a palindrome (32334355343323).

The spelling of 20032123220321 in words is "twenty trillion, thirty-two billion, one hundred twenty-three million, two hundred twenty thousand, three hundred twenty-one".