2121123230120 has 16 divisors (see below), whose sum is σ = 4772527267860. Its totient is φ = 848449292032.

The previous prime is 2121123230119. The next prime is 2121123230123. The reversal of 2121123230120 is 210323211212.

It can be written as a sum of positive squares in 2 ways, for example, as 2009912985796 + 111210244324 = 1417714^2 + 333482^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2121123230092 and 2121123230101.

It is not an unprimeable number, because it can be changed into a prime (2121123230123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26514040337 + ... + 26514040416.

Almost surely, 2^{2121123230120} is an apocalyptic number.

2121123230120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121123230120 is an abundant number, since it is smaller than the sum of its proper divisors (2651404037740).

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

2121123230120 is a wasteful number, since it uses less digits than its factorization.

2121123230120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53028080764 (or 53028080760 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 2121123230120 its reverse (210323211212), we get a palindrome (2331446441332).

The spelling of 2121123230120 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-three million, two hundred thirty thousand, one hundred twenty".