31311321213201 has 16 divisors (see below), whose sum is σ = 43947827712000. Its totient is φ = 19774620114768.

The previous prime is 31311321213091. The next prime is 31311321213209. The reversal of 31311321213201 is 10231212311313.

It is not a de Polignac number, because 31311321213201 - 2¹³ = 31311321205009 is a prime.

It is a super-2 number, since 2×31311321213201² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31311321213209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12014401 + ... + 14386398.

It is an arithmetic number, because the mean of its divisors is an integer number (2746739232000).

Almost surely, 2^{31311321213201} is an apocalyptic number.

It is an amenable number.

31311321213201 is a deficient number, since it is larger than the sum of its proper divisors (12636506498799).

31311321213201 is a wasteful number, since it uses less digits than its factorization.

31311321213201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26421628.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 31311321213201 its reverse (10231212311313), we get a palindrome (41542533524514).

The spelling of 31311321213201 in words is "thirty-one trillion, three hundred eleven billion, three hundred twenty-one million, two hundred thirteen thousand, two hundred one".