2123120331220 has 48 divisors (see below), whose sum is σ = 5259859411968. Its totient is φ = 704445454080.

The previous prime is 2123120331121. The next prime is 2123120331239. The reversal of 2123120331220 is 221330213212.

It is a junction number, because it is equal to n+sod(n) for n = 2123120331191 and 2123120331200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244594777 + ... + 244603456.

It is an arithmetic number, because the mean of its divisors is an integer number (109580404416).

Almost surely, 2^{2123120331220} is an apocalyptic number.

2123120331220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123120331220 is an abundant number, since it is smaller than the sum of its proper divisors (3136739080748).

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

2123120331220 is a wasteful number, since it uses less digits than its factorization.

2123120331220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489198280 (or 489198278 counting only the distinct ones).

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

Adding to 2123120331220 its reverse (221330213212), we get a palindrome (2344450544432).

The spelling of 2123120331220 in words is "two trillion, one hundred twenty-three billion, one hundred twenty million, three hundred thirty-one thousand, two hundred twenty".