4213681021 has 8 divisors (see below), whose sum is σ = 4597540704. Its totient is φ = 3829954320.

The previous prime is 4213681019. The next prime is 4213681033. The reversal of 4213681021 is 1201863124.

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 4213681021 - 2¹ = 4213681019 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 (4213681061) 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, 40050 + ... + 100156.

It is an arithmetic number, because the mean of its divisors is an integer number (574692588).

Almost surely, 2^4213681021 is an apocalyptic number.

It is an amenable number.

4213681021 is a deficient number, since it is larger than the sum of its proper divisors (383859683).

4213681021 is a wasteful number, since it uses less digits than its factorization.

4213681021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66491.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 4213681021 is about 64912.8725369630. The cubic root of 4213681021 is about 1615.1786005742.

The spelling of 4213681021 in words is "four billion, two hundred thirteen million, six hundred eighty-one thousand, twenty-one".