31301121132 has 72 divisors (see below), whose sum is σ = 83594434560. Its totient is φ = 9848031840.

The previous prime is 31301121101. The next prime is 31301121133. The reversal of 31301121132 is 23112110313.

It is a super-2 number, since 2×31301121132² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31301121133) 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 in 23 ways as a sum of consecutive naturals, for example, 100933 + ... + 269795.

Almost surely, 2^31301121132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31301121132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41797217280).

31301121132 is an abundant number, since it is smaller than the sum of its proper divisors (52293313428).

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

31301121132 is a wasteful number, since it uses less digits than its factorization.

31301121132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169163 (or 169158 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31301121132 its reverse (23112110313), we get a palindrome (54413231445).

The spelling of 31301121132 in words is "thirty-one billion, three hundred one million, one hundred twenty-one thousand, one hundred thirty-two".