31110221132 has 6 divisors (see below), whose sum is σ = 54442886988. Its totient is φ = 15555110564.

The previous prime is 31110221101. The next prime is 31110221137. The reversal of 31110221132 is 23112201113.

It is a super-2 number, since 2×31110221132² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31110221132.

It is not an unprimeable number, because it can be changed into a prime (31110221137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3888777638 + ... + 3888777645.

It is an arithmetic number, because the mean of its divisors is an integer number (9073814498).

Almost surely, 2^31110221132 is an apocalyptic number.

It is an amenable number.

31110221132 is a deficient number, since it is larger than the sum of its proper divisors (23332665856).

31110221132 is a wasteful number, since it uses less digits than its factorization.

31110221132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7777555287 (or 7777555285 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31110221132 its reverse (23112201113), we get a palindrome (54222422245).

The spelling of 31110221132 in words is "thirty-one billion, one hundred ten million, two hundred twenty-one thousand, one hundred thirty-two".