212123122213331 has 4 divisors (see below), whose sum is σ = 242426425386672. Its totient is φ = 181819819039992.

The previous prime is 212123122213313. The next prime is 212123122213367. The reversal of 212123122213331 is 133312221321212.

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

It is not a de Polignac number, because 212123122213331 - 2⁶ = 212123122213267 is a prime.

It is a super-2 number, since 2×212123122213331² (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 = 212123122213294 and 212123122213303.

It is not an unprimeable number, because it can be changed into a prime (212123122215331) 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, 15151651586660 + ... + 15151651586673.

It is an arithmetic number, because the mean of its divisors is an integer number (60606606346668).

Almost surely, 2^{212123122213331} is an apocalyptic number.

212123122213331 is a deficient number, since it is larger than the sum of its proper divisors (30303303173341).

212123122213331 is an equidigital number, since it uses as much as digits as its factorization.

212123122213331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30303303173340.

The product of its digits is 5184, while the sum is 29.

Adding to 212123122213331 its reverse (133312221321212), we get a palindrome (345435343534543).

The spelling of 212123122213331 in words is "two hundred twelve trillion, one hundred twenty-three billion, one hundred twenty-two million, two hundred thirteen thousand, three hundred thirty-one".