221210221001 has 64 divisors (see below), whose sum is σ = 281682800640. Its totient is φ = 168743520000.

The previous prime is 221210220991. The next prime is 221210221007. The reversal of 221210221001 is 100122012122.

It is a de Polignac number, because none of the positive numbers 2^k-221210221001 is a prime.

It is a super-2 number, since 2×221210221001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221210221007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 334659611 + ... + 334660271.

It is an arithmetic number, because the mean of its divisors is an integer number (4401293760).

Almost surely, 2^221210221001 is an apocalyptic number.

It is an amenable number.

221210221001 is a deficient number, since it is larger than the sum of its proper divisors (60472579639).

221210221001 is a wasteful number, since it uses less digits than its factorization.

221210221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221210221001 its reverse (100122012122), we get a palindrome (321332233123).

The spelling of 221210221001 in words is "two hundred twenty-one billion, two hundred ten million, two hundred twenty-one thousand, one".