2121132021223 has 4 divisors (see below), whose sum is σ = 2161153380168. Its totient is φ = 2081110662280.

The previous prime is 2121132021163. The next prime is 2121132021287. The reversal of 2121132021223 is 3221202311212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121132021223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121132021194 and 2121132021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121132021923) 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, 20010679393 + ... + 20010679498.

It is an arithmetic number, because the mean of its divisors is an integer number (540288345042).

Almost surely, 2^{2121132021223} is an apocalyptic number.

2121132021223 is a deficient number, since it is larger than the sum of its proper divisors (40021358945).

2121132021223 is an equidigital number, since it uses as much as digits as its factorization.

2121132021223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40021358944.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 2121132021223 its reverse (3221202311212), we get a palindrome (5342334332435).

The spelling of 2121132021223 in words is "two trillion, one hundred twenty-one billion, one hundred thirty-two million, twenty-one thousand, two hundred twenty-three".