31443230121 has 8 divisors (see below), whose sum is σ = 41931914304. Its totient is φ = 20958349680.

The previous prime is 31443230113. The next prime is 31443230123. The reversal of 31443230121 is 12103234413.

It is a happy number.

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

It is not a de Polignac number, because 31443230121 - 2³ = 31443230113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31443230091 and 31443230100.

It is not an unprimeable number, because it can be changed into a prime (31443230123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 931590 + ... + 964751.

It is an arithmetic number, because the mean of its divisors is an integer number (5241489288).

Almost surely, 2^31443230121 is an apocalyptic number.

It is an amenable number.

31443230121 is a deficient number, since it is larger than the sum of its proper divisors (10488684183).

31443230121 is a wasteful number, since it uses less digits than its factorization.

31443230121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901871.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31443230121 its reverse (12103234413), we get a palindrome (43546464534).

The spelling of 31443230121 in words is "thirty-one billion, four hundred forty-three million, two hundred thirty thousand, one hundred twenty-one".