31443230421321 has 4 divisors (see below), whose sum is σ = 41924307228432. Its totient is φ = 20962153614212.

The previous prime is 31443230421289. The next prime is 31443230421367. The reversal of 31443230421321 is 12312403234413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31443230421321 - 2⁵ = 31443230421289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31443230421121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5240538403551 + ... + 5240538403556.

It is an arithmetic number, because the mean of its divisors is an integer number (10481076807108).

Almost surely, 2^{31443230421321} is an apocalyptic number.

It is an amenable number.

31443230421321 is a deficient number, since it is larger than the sum of its proper divisors (10481076807111).

31443230421321 is a wasteful number, since it uses less digits than its factorization.

31443230421321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10481076807110.

The product of its (nonzero) digits is 41472, while the sum is 33.

Adding to 31443230421321 its reverse (12312403234413), we get a palindrome (43755633655734).

The spelling of 31443230421321 in words is "thirty-one trillion, four hundred forty-three billion, two hundred thirty million, four hundred twenty-one thousand, three hundred twenty-one".