31301123420 has 24 divisors (see below), whose sum is σ = 75122696544. Its totient is φ = 10731813696.

The previous prime is 31301123411. The next prime is 31301123461. The reversal of 31301123420 is 2432110313.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31301123392 and 31301123401.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 111789587 + ... + 111789866.

It is an arithmetic number, because the mean of its divisors is an integer number (3130112356).

Almost surely, 2^31301123420 is an apocalyptic number.

It is an amenable number.

31301123420 is an abundant number, since it is smaller than the sum of its proper divisors (43821573124).

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

31301123420 is a wasteful number, since it uses less digits than its factorization.

31301123420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223579469 (or 223579467 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31301123420 its reverse (2432110313), we get a palindrome (33733233733).

The spelling of 31301123420 in words is "thirty-one billion, three hundred one million, one hundred twenty-three thousand, four hundred twenty".