20100233231321 has 4 divisors (see below), whose sum is σ = 20100382348452. Its totient is φ = 20100084114192.

The previous prime is 20100233231269. The next prime is 20100233231327. The reversal of 20100233231321 is 12313233200102.

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 18256272925696 + 1843960305625 = 4272736^2 + 1357925^2 .

It is a cyclic number.

It is not a de Polignac number, because 20100233231321 - 2¹⁸ = 20100232969177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20100233231327) 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, 74356190 + ... + 74626023.

It is an arithmetic number, because the mean of its divisors is an integer number (5025095587113).

Almost surely, 2^{20100233231321} is an apocalyptic number.

It is an amenable number.

20100233231321 is a deficient number, since it is larger than the sum of its proper divisors (149117131).

20100233231321 is a wasteful number, since it uses less digits than its factorization.

20100233231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149117130.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20100233231321 its reverse (12313233200102), we get a palindrome (32413466431423).

The spelling of 20100233231321 in words is "twenty trillion, one hundred billion, two hundred thirty-three million, two hundred thirty-one thousand, three hundred twenty-one".