4020021311 has 8 divisors (see below), whose sum is σ = 4237177200. Its totient is φ = 3803423040.

The previous prime is 4020021293. The next prime is 4020021319. The reversal of 4020021311 is 1131200204.

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

It is not a de Polignac number, because 4020021311 - 2¹⁴ = 4020004927 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 (4020021319) 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, 124556 + ... + 153473.

It is an arithmetic number, because the mean of its divisors is an integer number (529647150).

Almost surely, 2^4020021311 is an apocalyptic number.

4020021311 is a deficient number, since it is larger than the sum of its proper divisors (217155889).

4020021311 is a wasteful number, since it uses less digits than its factorization.

4020021311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278809.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 4020021311 is about 63403.6379949921. The cubic root of 4020021311 is about 1590.0451328776.

Adding to 4020021311 its reverse (1131200204), we get a palindrome (5151221515).

The spelling of 4020021311 in words is "four billion, twenty million, twenty-one thousand, three hundred eleven".