31212113231211 has 32 divisors (see below), whose sum is σ = 47373841018368. Its totient is φ = 18093781981440.

The previous prime is 31212113231183. The next prime is 31212113231219. The reversal of 31212113231211 is 11213231121213.

It is not a de Polignac number, because 31212113231211 - 2⁹ = 31212113230699 is a prime.

It is a super-2 number, since 2×31212113231211² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31212113231219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98129445 + ... + 98447001.

It is an arithmetic number, because the mean of its divisors is an integer number (1480432531824).

Almost surely, 2^{31212113231211} is an apocalyptic number.

31212113231211 is a deficient number, since it is larger than the sum of its proper divisors (16161727787157).

31212113231211 is a wasteful number, since it uses less digits than its factorization.

31212113231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447091.

The product of its digits is 432, while the sum is 24.

Adding to 31212113231211 its reverse (11213231121213), we get a palindrome (42425344352424).

The spelling of 31212113231211 in words is "thirty-one trillion, two hundred twelve billion, one hundred thirteen million, two hundred thirty-one thousand, two hundred eleven".