4031221121 has 8 divisors (see below), whose sum is σ = 4162169088. Its totient is φ = 3900330000.

The previous prime is 4031221097. The next prime is 4031221153. The reversal of 4031221121 is 1211221304.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4031221121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4031221121.

It is not an unprimeable number, because it can be changed into a prime (4031221171) 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, 166646 + ... + 189296.

It is an arithmetic number, because the mean of its divisors is an integer number (520271136).

Almost surely, 2^4031221121 is an apocalyptic number.

It is an amenable number.

4031221121 is a deficient number, since it is larger than the sum of its proper divisors (130947967).

4031221121 is a wasteful number, since it uses less digits than its factorization.

4031221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28423.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 4031221121 is about 63491.8980736913. The cubic root of 4031221121 is about 1591.5203896505.

Adding to 4031221121 its reverse (1211221304), we get a palindrome (5242442425).

The spelling of 4031221121 in words is "four billion, thirty-one million, two hundred twenty-one thousand, one hundred twenty-one".