2121201112120 has 16 divisors (see below), whose sum is σ = 4772702502360. Its totient is φ = 848480444832.

The previous prime is 2121201112111. The next prime is 2121201112127. The reversal of 2121201112120 is 212111021212.

It is a junction number, because it is equal to n+sod(n) for n = 2121201112094 and 2121201112103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121201112127) 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, 26515013862 + ... + 26515013941.

Almost surely, 2^{2121201112120} is an apocalyptic number.

2121201112120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121201112120 is an abundant number, since it is smaller than the sum of its proper divisors (2651501390240).

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

2121201112120 is a wasteful number, since it uses less digits than its factorization.

2121201112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53030027814 (or 53030027810 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2121201112120 its reverse (212111021212), we get a palindrome (2333312133332).

The spelling of 2121201112120 in words is "two trillion, one hundred twenty-one billion, two hundred one million, one hundred twelve thousand, one hundred twenty".