2121233212120 has 64 divisors (see below), whose sum is σ = 5207245885440. Its totient is φ = 771271228800.

The previous prime is 2121233212081. The next prime is 2121233212151. The reversal of 2121233212120 is 212123321212.

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

It is a junction number, because it is equal to n+sod(n) for n = 2121233212091 and 2121233212100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3734889 + ... + 4265191.

It is an arithmetic number, because the mean of its divisors is an integer number (81363216960).

Almost surely, 2^{2121233212120} is an apocalyptic number.

2121233212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121233212120 is an abundant number, since it is smaller than the sum of its proper divisors (3086012673320).

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

2121233212120 is a wasteful number, since it uses less digits than its factorization.

2121233212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539416 (or 539412 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 2121233212120 its reverse (212123321212), we get a palindrome (2333356533332).

It can be divided in two parts, 212123 and 3212120, that added together give a palindrome (3424243).

The spelling of 2121233212120 in words is "two trillion, one hundred twenty-one billion, two hundred thirty-three million, two hundred twelve thousand, one hundred twenty".