31211224143213 has 8 divisors (see below), whose sum is σ = 41942642418688. Its totient is φ = 20643644314944.

The previous prime is 31211224143193. The next prime is 31211224143221. The reversal of 31211224143213 is 31234142211213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31211224143213 - 2⁶ = 31211224143149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211224143313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40959611356 + ... + 40959612117.

It is an arithmetic number, because the mean of its divisors is an integer number (5242830302336).

Almost surely, 2^{31211224143213} is an apocalyptic number.

It is an amenable number.

31211224143213 is a deficient number, since it is larger than the sum of its proper divisors (10731418275475).

31211224143213 is a wasteful number, since it uses less digits than its factorization.

31211224143213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81919223603.

The product of its digits is 6912, while the sum is 30.

Adding to 31211224143213 its reverse (31234142211213), we get a palindrome (62445366354426).

The spelling of 31211224143213 in words is "thirty-one trillion, two hundred eleven billion, two hundred twenty-four million, one hundred forty-three thousand, two hundred thirteen".