31443330121 has 16 divisors (see below), whose sum is σ = 36924192640. Its totient is φ = 26210407680.

The previous prime is 31443330091. The next prime is 31443330143. The reversal of 31443330121 is 12103334413.

It is a cyclic number.

It is not a de Polignac number, because 31443330121 - 2²¹ = 31441232969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31443336121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531610 + ... + 587788.

It is an arithmetic number, because the mean of its divisors is an integer number (2307762040).

Almost surely, 2^31443330121 is an apocalyptic number.

It is an amenable number.

31443330121 is a deficient number, since it is larger than the sum of its proper divisors (5480862519).

31443330121 is a wasteful number, since it uses less digits than its factorization.

31443330121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58384.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31443330121 its reverse (12103334413), we get a palindrome (43546664534).

The spelling of 31443330121 in words is "thirty-one billion, four hundred forty-three million, three hundred thirty thousand, one hundred twenty-one".