213121210022233 has 4 divisors (see below), whose sum is σ = 213121267308340. Its totient is φ = 213121152736128.

The previous prime is 213121210022111. The next prime is 213121210022249. The reversal of 213121210022233 is 332220012121312.

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 186184196574489 + 26937013447744 = 13644933^2 + 5190088^2 .

It is a cyclic number.

It is not a de Polignac number, because 213121210022233 - 2⁹ = 213121210021721 is a prime.

It is a super-2 number, since 2×213121210022233² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213121210022198 and 213121210022207.

It is not an unprimeable number, because it can be changed into a prime (213121210025233) 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, 22643760 + ... + 30642817.

It is an arithmetic number, because the mean of its divisors is an integer number (53280316827085).

Almost surely, 2^{213121210022233} is an apocalyptic number.

It is an amenable number.

213121210022233 is a deficient number, since it is larger than the sum of its proper divisors (57286107).

213121210022233 is an equidigital number, since it uses as much as digits as its factorization.

213121210022233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57286106.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 213121210022233 its reverse (332220012121312), we get a palindrome (545341222143545).

The spelling of 213121210022233 in words is "two hundred thirteen trillion, one hundred twenty-one billion, two hundred ten million, twenty-two thousand, two hundred thirty-three".