311221310231132 has 12 divisors (see below), whose sum is σ = 622442620462320. Its totient is φ = 133380561527616.

The previous prime is 311221310231119. The next prime is 311221310231137. The reversal of 311221310231132 is 231132013122113.

311221310231132 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311221310231137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5557523396957 + ... + 5557523397012.

It is an arithmetic number, because the mean of its divisors is an integer number (51870218371860).

Almost surely, 2^{311221310231132} is an apocalyptic number.

It is an amenable number.

311221310231132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311221310231132 is a wasteful number, since it uses less digits than its factorization.

311221310231132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11115046793980 (or 11115046793978 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 311221310231132 its reverse (231132013122113), we get a palindrome (542353323353245).

The spelling of 311221310231132 in words is "three hundred eleven trillion, two hundred twenty-one billion, three hundred ten million, two hundred thirty-one thousand, one hundred thirty-two".