20123212123300 has 144 divisors (see below), whose sum is σ = 51616265222592. Its totient is φ = 6713204313600.

The previous prime is 20123212123237. The next prime is 20123212123303. The reversal of 20123212123300 is 332121232102.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (20123212123303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1985719 + ... + 6647518.

It is an arithmetic number, because the mean of its divisors is an integer number (358446286268).

Almost surely, 2^{20123212123300} is an apocalyptic number.

20123212123300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20123212123300 is an abundant number, since it is smaller than the sum of its proper divisors (31493053099292).

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

20123212123300 is a wasteful number, since it uses less digits than its factorization.

20123212123300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8633438 (or 8633431 counting only the distinct ones).

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

Adding to 20123212123300 its reverse (332121232102), we get a palindrome (20455333355402).

The spelling of 20123212123300 in words is "twenty trillion, one hundred twenty-three billion, two hundred twelve million, one hundred twenty-three thousand, three hundred".