20321231099999 has 8 divisors (see below), whose sum is σ = 20368628582400. Its totient is φ = 20273878526200.

The previous prime is 20321231099951. The next prime is 20321231100047. The reversal of 20321231099999 is 99999013212302.

It is an interprime number because it is at equal distance from previous prime (20321231099951) and next prime (20321231100047).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20321231099999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321231092999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10321007 + ... + 12131184.

It is an arithmetic number, because the mean of its divisors is an integer number (2546078572800).

Almost surely, 2^{20321231099999} is an apocalyptic number.

20321231099999 is a deficient number, since it is larger than the sum of its proper divisors (47397482401).

20321231099999 is a wasteful number, since it uses less digits than its factorization.

20321231099999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22454301.

The product of its (nonzero) digits is 4251528, while the sum is 59.

The spelling of 20321231099999 in words is "twenty trillion, three hundred twenty-one billion, two hundred thirty-one million, ninety-nine thousand, nine hundred ninety-nine".