31221120304142 has 8 divisors (see below), whose sum is σ = 47200433846016. Its totient is φ = 15487642355472.

The previous prime is 31221120304091. The next prime is 31221120304247. The reversal of 31221120304142 is 24140302112213.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61458897983 + ... + 61458898490.

It is an arithmetic number, because the mean of its divisors is an integer number (5900054230752).

Almost surely, 2^{31221120304142} is an apocalyptic number.

31221120304142 is a deficient number, since it is larger than the sum of its proper divisors (15979313541874).

31221120304142 is a wasteful number, since it uses less digits than its factorization.

31221120304142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122917796602.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 31221120304142 its reverse (24140302112213), we get a palindrome (55361422416355).

The spelling of 31221120304142 in words is "thirty-one trillion, two hundred twenty-one billion, one hundred twenty million, three hundred four thousand, one hundred forty-two".