2121203103320 has 64 divisors (see below), whose sum is σ = 5454647654400. Its totient is φ = 727252917120.

The previous prime is 2121203103319. The next prime is 2121203103353. The reversal of 2121203103320 is 233013021212.

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 = 2121203103292 and 2121203103301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23631725 + ... + 23721315.

It is an arithmetic number, because the mean of its divisors is an integer number (85228869600).

Almost surely, 2^{2121203103320} is an apocalyptic number.

2121203103320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121203103320 is an abundant number, since it is smaller than the sum of its proper divisors (3333444551080).

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

2121203103320 is a wasteful number, since it uses less digits than its factorization.

2121203103320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174168 (or 174164 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 2121203103320 its reverse (233013021212), we get a palindrome (2354216124532).

The spelling of 2121203103320 in words is "two trillion, one hundred twenty-one billion, two hundred three million, one hundred three thousand, three hundred twenty".