31430123343121 has 8 divisors (see below), whose sum is σ = 33120817050080. Its totient is φ = 29743077305088.

The previous prime is 31430123342999. The next prime is 31430123343161. The reversal of 31430123343121 is 12134332103413.

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

It is a cyclic number.

It is not a de Polignac number, because 31430123343121 - 2²¹ = 31430121245969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31430123343161) 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, 911899536 + ... + 911934001.

It is an arithmetic number, because the mean of its divisors is an integer number (4140102131260).

Almost surely, 2^{31430123343121} is an apocalyptic number.

It is an amenable number.

31430123343121 is a deficient number, since it is larger than the sum of its proper divisors (1690693706959).

31430123343121 is a wasteful number, since it uses less digits than its factorization.

31430123343121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823834463.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 31430123343121 its reverse (12134332103413), we get a palindrome (43564455446534).

The spelling of 31430123343121 in words is "thirty-one trillion, four hundred thirty billion, one hundred twenty-three million, three hundred forty-three thousand, one hundred twenty-one".