221211310021001 has 8 divisors (see below), whose sum is σ = 222818491656000. Its totient is φ = 219608254655920.

The previous prime is 221211310020983. The next prime is 221211310021049. The reversal of 221211310021001 is 100120013112122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 221211310021001 - 2¹⁰ = 221211310019977 is a prime.

It is a super-2 number, since 2×221211310021001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221211310021061) 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, 1031459870 + ... + 1031674311.

It is an arithmetic number, because the mean of its divisors is an integer number (27852311457000).

Almost surely, 2^{221211310021001} is an apocalyptic number.

It is an amenable number.

221211310021001 is a deficient number, since it is larger than the sum of its proper divisors (1607181634999).

221211310021001 is a wasteful number, since it uses less digits than its factorization.

221211310021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063134959.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 221211310021001 its reverse (100120013112122), we get a palindrome (321331323133123).

The spelling of 221211310021001 in words is "two hundred twenty-one trillion, two hundred eleven billion, three hundred ten million, twenty-one thousand, one".