3121277420 has 24 divisors (see below), whose sum is σ = 6556416048. Its totient is φ = 1248180800.

The previous prime is 3121277359. The next prime is 3121277429. The reversal of 3121277420 is 247721213.

It is not an unprimeable number, because it can be changed into a prime (3121277429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65690 + ... + 102750.

It is an arithmetic number, because the mean of its divisors is an integer number (273184002).

Almost surely, 2^3121277420 is an apocalyptic number.

It is an amenable number.

3121277420 is an abundant number, since it is smaller than the sum of its proper divisors (3435138628).

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

3121277420 is a wasteful number, since it uses less digits than its factorization.

3121277420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41281 (or 41279 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 3121277420 is about 55868.3937481650. The cubic root of 3121277420 is about 1461.4281109766.

Adding to 3121277420 its reverse (247721213), we get a palindrome (3368998633).

The spelling of 3121277420 in words is "three billion, one hundred twenty-one million, two hundred seventy-seven thousand, four hundred twenty".