3121322421 has 8 divisors (see below), whose sum is σ = 4756300864. Its totient is φ = 1783612800.

The previous prime is 3121322353. The next prime is 3121322437. The reversal of 3121322421 is 1242231213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3121322421 - 2¹⁷ = 3121191349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 148634401 = 3121322421 / (3 + 1 + 2 + 1 + 3 + 2 + 2 + 4 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121322021) 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, 74317180 + ... + 74317221.

It is an arithmetic number, because the mean of its divisors is an integer number (594537608).

Almost surely, 2^3121322421 is an apocalyptic number.

It is an amenable number.

3121322421 is a deficient number, since it is larger than the sum of its proper divisors (1634978443).

3121322421 is a wasteful number, since it uses less digits than its factorization.

3121322421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148634411.

The product of its digits is 576, while the sum is 21.

The square root of 3121322421 is about 55868.7964878428. The cubic root of 3121322421 is about 1461.4351343201.

Adding to 3121322421 its reverse (1242231213), we get a palindrome (4363553634).

The spelling of 3121322421 in words is "three billion, one hundred twenty-one million, three hundred twenty-two thousand, four hundred twenty-one".