2121603426233 has 4 divisors (see below), whose sum is σ = 2121669698340. Its totient is φ = 2121537154128.

The previous prime is 2121603426223. The next prime is 2121603426269. The reversal of 2121603426233 is 3326243061212.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60119116864 + 2061484309369 = 245192^2 + 1435787^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121603426233 - 2²² = 2121599231929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121603426193 and 2121603426202.

It is not an unprimeable number, because it can be changed into a prime (2121603426223) 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, 33088010 + ... + 33152067.

It is an arithmetic number, because the mean of its divisors is an integer number (530417424585).

Almost surely, 2^{2121603426233} is an apocalyptic number.

It is an amenable number.

2121603426233 is a deficient number, since it is larger than the sum of its proper divisors (66272107).

2121603426233 is an equidigital number, since it uses as much as digits as its factorization.

2121603426233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66272106.

The product of its (nonzero) digits is 62208, while the sum is 35.

Adding to 2121603426233 its reverse (3326243061212), we get a palindrome (5447846487445).

The spelling of 2121603426233 in words is "two trillion, one hundred twenty-one billion, six hundred three million, four hundred twenty-six thousand, two hundred thirty-three".