2121331103320 has 64 divisors (see below), whose sum is σ = 5607434679840. Its totient is φ = 712055193600.

The previous prime is 2121331103267. The next prime is 2121331103329. The reversal of 2121331103320 is 233011331212.

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 = 2121331103291 and 2121331103300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121331103329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185425321 + ... + 185436760.

Almost surely, 2^{2121331103320} is an apocalyptic number.

2121331103320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121331103320 is an abundant number, since it is smaller than the sum of its proper divisors (3486103576520).

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

2121331103320 is a wasteful number, since it uses less digits than its factorization.

2121331103320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370862116 (or 370862112 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 2121331103320 its reverse (233011331212), we get a palindrome (2354342434532).

The spelling of 2121331103320 in words is "two trillion, one hundred twenty-one billion, three hundred thirty-one million, one hundred three thousand, three hundred twenty".