31234122421 has 4 divisors (see below), whose sum is σ = 31537366432. Its totient is φ = 30930878412.

The previous prime is 31234122371. The next prime is 31234122449. The reversal of 31234122421 is 12422143213.

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 31234122421 - 2¹¹ = 31234120373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31234123421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151621851 + ... + 151622056.

It is an arithmetic number, because the mean of its divisors is an integer number (7884341608).

Almost surely, 2^31234122421 is an apocalyptic number.

It is an amenable number.

31234122421 is a deficient number, since it is larger than the sum of its proper divisors (303244011).

31234122421 is a wasteful number, since it uses less digits than its factorization.

31234122421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303244010.

The product of its digits is 2304, while the sum is 25.

Adding to 31234122421 its reverse (12422143213), we get a palindrome (43656265634).

The spelling of 31234122421 in words is "thirty-one billion, two hundred thirty-four million, one hundred twenty-two thousand, four hundred twenty-one".