2121220031303 has 4 divisors (see below), whose sum is σ = 2121283142040. Its totient is φ = 2121156920568.

The previous prime is 2121220031297. The next prime is 2121220031311. The reversal of 2121220031303 is 3031300221212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2121220031303 - 2⁶ = 2121220031239 is a prime.

It is a super-2 number, since 2×2121220031303² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121220031363) 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, 31504925 + ... + 31572182.

It is an arithmetic number, because the mean of its divisors is an integer number (530320785510).

Almost surely, 2^{2121220031303} is an apocalyptic number.

2121220031303 is a deficient number, since it is larger than the sum of its proper divisors (63110737).

2121220031303 is an equidigital number, since it uses as much as digits as its factorization.

2121220031303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63110736.

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

Adding to 2121220031303 its reverse (3031300221212), we get a palindrome (5152520252515).

The spelling of 2121220031303 in words is "two trillion, one hundred twenty-one billion, two hundred twenty million, thirty-one thousand, three hundred three".