4013020422221 has 4 divisors (see below), whose sum is σ = 4088737788732. Its totient is φ = 3937303055712.

The previous prime is 4013020422209. The next prime is 4013020422247. The reversal of 4013020422221 is 1222240203104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3268448173225 + 744572248996 = 1807885^2 + 862886^2 .

It is a cyclic number.

It is not a de Polignac number, because 4013020422221 - 2¹⁴ = 4013020405837 is a prime.

It is a super-2 number, since 2×4013020422221² (a number of 26 digits) 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 (4013020422251) 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, 37858683176 + ... + 37858683281.

It is an arithmetic number, because the mean of its divisors is an integer number (1022184447183).

Almost surely, 2^{4013020422221} is an apocalyptic number.

It is an amenable number.

4013020422221 is a deficient number, since it is larger than the sum of its proper divisors (75717366511).

4013020422221 is an equidigital number, since it uses as much as digits as its factorization.

4013020422221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75717366510.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 4013020422221 its reverse (1222240203104), we get a palindrome (5235260625325).

The spelling of 4013020422221 in words is "four trillion, thirteen billion, twenty million, four hundred twenty-two thousand, two hundred twenty-one".