20123231322100 has 36 divisors (see below), whose sum is σ = 43671625561900. Its totient is φ = 8048515829760.

The previous prime is 20123231322097. The next prime is 20123231322157. The reversal of 20123231322100 is 122313232102.

It can be written as a sum of positive squares in 6 ways, for example, as 4029831413136 + 16093399908964 = 2007444^2 + 4011658^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8666655 + ... + 10740454.

Almost surely, 2^{20123231322100} is an apocalyptic number.

20123231322100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20123231322100 is an abundant number, since it is smaller than the sum of its proper divisors (23548394239800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123231322100 is a wasteful number, since it uses less digits than its factorization.

20123231322100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19417492 (or 19417485 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20123231322100 its reverse (122313232102), we get a palindrome (20245544554202).

The spelling of 20123231322100 in words is "twenty trillion, one hundred twenty-three billion, two hundred thirty-one million, three hundred twenty-two thousand, one hundred".