31320422124 has 96 divisors (see below), whose sum is σ = 80349796800. Its totient is φ = 9451438080.

The previous prime is 31320422117. The next prime is 31320422131. The reversal of 31320422124 is 42122402313.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31320422117) and next prime (31320422131).

It is a junction number, because it is equal to n+sod(n) for n = 31320422094 and 31320422103.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1581564 + ... + 1601244.

It is an arithmetic number, because the mean of its divisors is an integer number (836977050).

Almost surely, 2^31320422124 is an apocalyptic number.

31320422124 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31320422124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40174898400).

31320422124 is an abundant number, since it is smaller than the sum of its proper divisors (49029374676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31320422124 is a wasteful number, since it uses less digits than its factorization.

31320422124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20003 (or 20001 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31320422124 its reverse (42122402313), we get a palindrome (73442824437).

The spelling of 31320422124 in words is "thirty-one billion, three hundred twenty million, four hundred twenty-two thousand, one hundred twenty-four".