4000420021111 has 4 divisors (see below), whose sum is σ = 4011320348512. Its totient is φ = 3989519693712.

The previous prime is 4000420021051. The next prime is 4000420021133. The reversal of 4000420021111 is 1111200240004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 4000420021111 - 2²¹ = 4000417923959 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 (4000420021151) 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, 5450163150 + ... + 5450163883.

It is an arithmetic number, because the mean of its divisors is an integer number (1002830087128).

Almost surely, 2^{4000420021111} is an apocalyptic number.

4000420021111 is a deficient number, since it is larger than the sum of its proper divisors (10900327401).

4000420021111 is a wasteful number, since it uses less digits than its factorization.

4000420021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10900327400.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 4000420021111 its reverse (1111200240004), we get a palindrome (5111620261115).

The spelling of 4000420021111 in words is "four trillion, four hundred twenty million, twenty-one thousand, one hundred eleven".