31140142432221 has 8 divisors (see below), whose sum is σ = 41520712618944. Its totient is φ = 20759833600160.

The previous prime is 31140142432177. The next prime is 31140142432237. The reversal of 31140142432221 is 12223424104113.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31140142432221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31140142432271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65060481 + ... + 65537366.

It is an arithmetic number, because the mean of its divisors is an integer number (5190089077368).

Almost surely, 2^{31140142432221} is an apocalyptic number.

It is an amenable number.

31140142432221 is a deficient number, since it is larger than the sum of its proper divisors (10380570186723).

31140142432221 is a wasteful number, since it uses less digits than its factorization.

31140142432221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130677331.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 31140142432221 its reverse (12223424104113), we get a palindrome (43363566536334).

The spelling of 31140142432221 in words is "thirty-one trillion, one hundred forty billion, one hundred forty-two million, four hundred thirty-two thousand, two hundred twenty-one".