212120322331 has 4 divisors (see below), whose sum is σ = 212121648000. Its totient is φ = 212118996664.

The previous prime is 212120322319. The next prime is 212120322341. The reversal of 212120322331 is 133223021212.

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

It is a cyclic number.

It is not a de Polignac number, because 212120322331 - 2²⁹ = 211583451419 is a prime.

It is a super-2 number, since 2×212120322331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212120322301) 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, 383611 + ... + 755908.

It is an arithmetic number, because the mean of its divisors is an integer number (53030412000).

Almost surely, 2^212120322331 is an apocalyptic number.

212120322331 is a deficient number, since it is larger than the sum of its proper divisors (1325669).

212120322331 is a wasteful number, since it uses less digits than its factorization.

212120322331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325668.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 212120322331 its reverse (133223021212), we get a palindrome (345343343543).

The spelling of 212120322331 in words is "two hundred twelve billion, one hundred twenty million, three hundred twenty-two thousand, three hundred thirty-one".