3421240021 has 8 divisors (see below), whose sum is σ = 3683888640. Its totient is φ = 3165413568.

The previous prime is 3421239947. The next prime is 3421240033. The reversal of 3421240021 is 1200421243.

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 3421240021 - 2⁹ = 3421239509 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 (3421240061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1704501 + ... + 1706506.

It is an arithmetic number, because the mean of its divisors is an integer number (460486080).

Almost surely, 2^3421240021 is an apocalyptic number.

It is an amenable number.

3421240021 is a deficient number, since it is larger than the sum of its proper divisors (262648619).

3421240021 is a wasteful number, since it uses less digits than its factorization.

3421240021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3411083.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 3421240021 is about 58491.3670638668. The cubic root of 3421240021 is about 1506.8193243774.

Adding to 3421240021 its reverse (1200421243), we get a palindrome (4621661264).

The spelling of 3421240021 in words is "three billion, four hundred twenty-one million, two hundred forty thousand, twenty-one".