31434031121 has 4 divisors (see below), whose sum is σ = 31435746672. Its totient is φ = 31432315572.

The previous prime is 31434031117. The next prime is 31434031157. The reversal of 31434031121 is 12113043413.

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 31434031121 - 2² = 31434031117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31434031021) 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, 829991 + ... + 867036.

It is an arithmetic number, because the mean of its divisors is an integer number (7858936668).

Almost surely, 2^31434031121 is an apocalyptic number.

It is an amenable number.

31434031121 is a deficient number, since it is larger than the sum of its proper divisors (1715551).

31434031121 is a wasteful number, since it uses less digits than its factorization.

31434031121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715550.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31434031121 its reverse (12113043413), we get a palindrome (43547074534).

The spelling of 31434031121 in words is "thirty-one billion, four hundred thirty-four million, thirty-one thousand, one hundred twenty-one".