3121343420 has 24 divisors (see below), whose sum is σ = 7059038784. Its totient is φ = 1152495936.

The previous prime is 3121343413. The next prime is 3121343437. The reversal of 3121343420 is 243431213.

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, 6002324 + ... + 6002843.

It is an arithmetic number, because the mean of its divisors is an integer number (294126616).

Almost surely, 2^3121343420 is an apocalyptic number.

It is an amenable number.

3121343420 is an abundant number, since it is smaller than the sum of its proper divisors (3937695364).

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

3121343420 is a wasteful number, since it uses less digits than its factorization.

3121343420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12005189 (or 12005187 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 3121343420 is about 55868.9844189063. The cubic root of 3121343420 is about 1461.4384116284.

Adding to 3121343420 its reverse (243431213), we get a palindrome (3364774633).

The spelling of 3121343420 in words is "three billion, one hundred twenty-one million, three hundred forty-three thousand, four hundred twenty".