2123111312420 has 24 divisors (see below), whose sum is σ = 5095467150144. Its totient is φ = 727923878496.

The previous prime is 2123111312353. The next prime is 2123111312429. The reversal of 2123111312420 is 242131113212.

It is not an unprimeable number, because it can be changed into a prime (2123111312429) 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, 7582540262 + ... + 7582540541.

It is an arithmetic number, because the mean of its divisors is an integer number (212311131256).

Almost surely, 2^{2123111312420} is an apocalyptic number.

2123111312420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123111312420 is an abundant number, since it is smaller than the sum of its proper divisors (2972355837724).

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

2123111312420 is a wasteful number, since it uses less digits than its factorization.

2123111312420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15165080819 (or 15165080817 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 2123111312420 its reverse (242131113212), we get a palindrome (2365242425632).

The spelling of 2123111312420 in words is "two trillion, one hundred twenty-three billion, one hundred eleven million, three hundred twelve thousand, four hundred twenty".