31301133021 has 48 divisors (see below), whose sum is σ = 49431118464. Its totient is φ = 19754025984.

The previous prime is 31301132999. The next prime is 31301133037. The reversal of 31301133021 is 12033110313.

It is a happy number.

31301133021 is a `hidden beast` number, since 31 + 301 + 1 + 330 + 2 + 1 = 666.

It is not a de Polignac number, because 31301133021 - 2¹⁰ = 31301131997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31301132985 and 31301133003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301133041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 513265 + ... + 571001.

It is an arithmetic number, because the mean of its divisors is an integer number (1029814968).

Almost surely, 2^31301133021 is an apocalyptic number.

It is an amenable number.

31301133021 is a deficient number, since it is larger than the sum of its proper divisors (18129985443).

31301133021 is an equidigital number, since it uses as much as digits as its factorization.

31301133021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57872 (or 57860 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31301133021 its reverse (12033110313), we get a palindrome (43334243334).

The spelling of 31301133021 in words is "thirty-one billion, three hundred one million, one hundred thirty-three thousand, twenty-one".