31211323211011 has 8 divisors (see below), whose sum is σ = 33250027472784. Its totient is φ = 29195146068480.

The previous prime is 31211323210979. The next prime is 31211323211023. The reversal of 31211323211011 is 11011232311213.

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

It is not a de Polignac number, because 31211323211011 - 2⁵ = 31211323210979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31211323211911) 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, 5631776950 + ... + 5631782491.

It is an arithmetic number, because the mean of its divisors is an integer number (4156253434098).

Almost surely, 2^{31211323211011} is an apocalyptic number.

31211323211011 is a deficient number, since it is larger than the sum of its proper divisors (2038704261773).

31211323211011 is a wasteful number, since it uses less digits than its factorization.

31211323211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11263559621.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 31211323211011 its reverse (11011232311213), we get a palindrome (42222555522224).

The spelling of 31211323211011 in words is "thirty-one trillion, two hundred eleven billion, three hundred twenty-three million, two hundred eleven thousand, eleven".