4220231221001 has 4 divisors (see below), whose sum is σ = 4468480116372. Its totient is φ = 3971982325632.

The previous prime is 4220231220983. The next prime is 4220231221007. The reversal of 4220231221001 is 1001221320224.

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 2079511086601 + 2140720134400 = 1442051^2 + 1463120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4220231221001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4220231221007) 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, 124124447660 + ... + 124124447693.

It is an arithmetic number, because the mean of its divisors is an integer number (1117120029093).

Almost surely, 2^{4220231221001} is an apocalyptic number.

It is an amenable number.

4220231221001 is a deficient number, since it is larger than the sum of its proper divisors (248248895371).

4220231221001 is a wasteful number, since it uses less digits than its factorization.

4220231221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248248895370.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 4220231221001 its reverse (1001221320224), we get a palindrome (5221452541225).

The spelling of 4220231221001 in words is "four trillion, two hundred twenty billion, two hundred thirty-one million, two hundred twenty-one thousand, one".