31213031201223 has 8 divisors (see below), whose sum is σ = 42959870900736. Its totient is φ = 20137439484600.

The previous prime is 31213031201203. The next prime is 31213031201239. The reversal of 31213031201223 is 32210213031213.

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

It is not a de Polignac number, because 31213031201223 - 2⁹ = 31213031200711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31213031201193 and 31213031201202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213031201203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167811995613 + ... + 167811995798.

It is an arithmetic number, because the mean of its divisors is an integer number (5369983862592).

Almost surely, 2^{31213031201223} is an apocalyptic number.

31213031201223 is a deficient number, since it is larger than the sum of its proper divisors (11746839699513).

31213031201223 is a wasteful number, since it uses less digits than its factorization.

31213031201223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335623991445.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31213031201223 its reverse (32210213031213), we get a palindrome (63423244232436).

The spelling of 31213031201223 in words is "thirty-one trillion, two hundred thirteen billion, thirty-one million, two hundred one thousand, two hundred twenty-three".