4021221111 has 8 divisors (see below), whose sum is σ = 5362251504. Its totient is φ = 2680502400.

The previous prime is 4021221109. The next prime is 4021221119. The reversal of 4021221111 is 1111221204.

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

It is not a de Polignac number, because 4021221111 - 2¹ = 4021221109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021221119) 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, 45940 + ... + 100761.

It is an arithmetic number, because the mean of its divisors is an integer number (670281438).

Almost surely, 2^4021221111 is an apocalyptic number.

4021221111 is a deficient number, since it is larger than the sum of its proper divisors (1341030393).

4021221111 is a wasteful number, since it uses less digits than its factorization.

4021221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155841.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 4021221111 is about 63413.0988913174. The cubic root of 4021221111 is about 1590.2033033816.

Adding to 4021221111 its reverse (1111221204), we get a palindrome (5132442315).

The spelling of 4021221111 in words is "four billion, twenty-one million, two hundred twenty-one thousand, one hundred eleven".