4021316981 has 4 divisors (see below), whose sum is σ = 4386891264. Its totient is φ = 3655742700.

The previous prime is 4021316939. The next prime is 4021317059. The reversal of 4021316981 is 1896131204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4021316981 - 2²² = 4017122677 is a prime.

It is a super-2 number, since 2×4021316981² = 32341980523357908722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021316881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182787125 + ... + 182787146.

It is an arithmetic number, because the mean of its divisors is an integer number (1096722816).

Almost surely, 2^4021316981 is an apocalyptic number.

It is an amenable number.

4021316981 is a deficient number, since it is larger than the sum of its proper divisors (365574283).

4021316981 is a wasteful number, since it uses less digits than its factorization.

4021316981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365574282.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 4021316981 is about 63413.8548031895. The cubic root of 4021316981 is about 1590.2159406357.

The spelling of 4021316981 in words is "four billion, twenty-one million, three hundred sixteen thousand, nine hundred eighty-one".