3131420021 has 8 divisors (see below), whose sum is σ = 3149256000. Its totient is φ = 3113605440.

The previous prime is 3131419999. The next prime is 3131420063. The reversal of 3131420021 is 1200241313.

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

It is a cyclic number.

It is not a de Polignac number, because 3131420021 - 2¹⁴ = 3131403637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131420321) by changing a digit.

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, 356045 + ... + 364733.

It is an arithmetic number, because the mean of its divisors is an integer number (393657000).

Almost surely, 2^3131420021 is an apocalyptic number.

It is an amenable number.

3131420021 is a deficient number, since it is larger than the sum of its proper divisors (17835979).

3131420021 is a wasteful number, since it uses less digits than its factorization.

3131420021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10699.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 3131420021 is about 55959.0923889943. The cubic root of 3131420021 is about 1463.0093712213.

Adding to 3131420021 its reverse (1200241313), we get a palindrome (4331661334).

The spelling of 3131420021 in words is "three billion, one hundred thirty-one million, four hundred twenty thousand, twenty-one".