20312230212120 has 256 divisors, whose sum is σ = 75976679116800. Its totient is φ = 4220519708160.

The previous prime is 20312230212059. The next prime is 20312230212139. The reversal of 20312230212120 is 2121203221302.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 261517851 + ... + 261595509.

It is an arithmetic number, because the mean of its divisors is an integer number (296783902800).

Almost surely, 2^{20312230212120} is an apocalyptic number.

20312230212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20312230212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37988339558400).

20312230212120 is an abundant number, since it is smaller than the sum of its proper divisors (55664448904680).

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

20312230212120 is a wasteful number, since it uses less digits than its factorization.

20312230212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105998 (or 105994 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20312230212120 its reverse (2121203221302), we get a palindrome (22433433433422).

The spelling of 20312230212120 in words is "twenty trillion, three hundred twelve billion, two hundred thirty million, two hundred twelve thousand, one hundred twenty".