221121122001 has 8 divisors (see below), whose sum is σ = 317507252160. Its totient is φ = 136074536592.

The previous prime is 221121121997. The next prime is 221121122009. The reversal of 221121122001 is 100221121122.

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

It is not a de Polignac number, because 221121122001 - 2² = 221121121997 is a prime.

It is a super-2 number, since 2×221121122001² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221121122009) 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, 2834886141 + ... + 2834886218.

It is an arithmetic number, because the mean of its divisors is an integer number (39688406520).

Almost surely, 2^221121122001 is an apocalyptic number.

It is an amenable number.

221121122001 is a deficient number, since it is larger than the sum of its proper divisors (96386130159).

221121122001 is a wasteful number, since it uses less digits than its factorization.

221121122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5669772375.

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

Adding to 221121122001 its reverse (100221121122), we get a palindrome (321342243123).

The spelling of 221121122001 in words is "two hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-two thousand, one".