212320321631 has 16 divisors (see below), whose sum is σ = 235038804000. Its totient is φ = 190190851200.

The previous prime is 212320321607. The next prime is 212320321637. The reversal of 212320321631 is 136123023212.

It is a happy number.

212320321631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212320321631 - 2¹⁴ = 212320305247 is a prime.

It is a super-2 number, since 2×212320321631² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212320321631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212320321637) 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 15 ways as a sum of consecutive naturals, for example, 272156 + ... + 706193.

It is an arithmetic number, because the mean of its divisors is an integer number (14689925250).

Almost surely, 2^212320321631 is an apocalyptic number.

212320321631 is a deficient number, since it is larger than the sum of its proper divisors (22718482369).

212320321631 is a wasteful number, since it uses less digits than its factorization.

212320321631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978650.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 212320321631 its reverse (136123023212), we get a palindrome (348443344843).

The spelling of 212320321631 in words is "two hundred twelve billion, three hundred twenty million, three hundred twenty-one thousand, six hundred thirty-one".