2121001103320 has 64 divisors (see below), whose sum is σ = 5385614119200. Its totient is φ = 744677498880.

The previous prime is 2121001103297. The next prime is 2121001103339. The reversal of 2121001103320 is 233011001212.

It is a junction number, because it is equal to n+sod(n) for n = 2121001103294 and 2121001103303.

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, 83098569 + ... + 83124088.

Almost surely, 2^{2121001103320} is an apocalyptic number.

2121001103320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121001103320 is an abundant number, since it is smaller than the sum of its proper divisors (3264613015880).

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

2121001103320 is a wasteful number, since it uses less digits than its factorization.

2121001103320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166222708 (or 166222704 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 2121001103320 its reverse (233011001212), we get a palindrome (2354012104532).

The spelling of 2121001103320 in words is "two trillion, one hundred twenty-one billion, one million, one hundred three thousand, three hundred twenty".