2121012020233 has 4 divisors (see below), whose sum is σ = 2141604370048. Its totient is φ = 2100419670420.

The previous prime is 2121012020221. The next prime is 2121012020279. The reversal of 2121012020233 is 3320202101212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121012020233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121012020233.

It is not an unprimeable number, because it can be changed into a prime (2121012020333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10296174753 + ... + 10296174958.

It is an arithmetic number, because the mean of its divisors is an integer number (535401092512).

Almost surely, 2^{2121012020233} is an apocalyptic number.

It is an amenable number.

2121012020233 is a deficient number, since it is larger than the sum of its proper divisors (20592349815).

2121012020233 is a wasteful number, since it uses less digits than its factorization.

2121012020233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20592349814.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 2121012020233 its reverse (3320202101212), we get a palindrome (5441214121445).

The spelling of 2121012020233 in words is "two trillion, one hundred twenty-one billion, twelve million, twenty thousand, two hundred thirty-three".