221001220101 has 8 divisors (see below), whose sum is σ = 301855325184. Its totient is φ = 143740630880.

The previous prime is 221001220079. The next prime is 221001220103. The reversal of 221001220101 is 101022100122.

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 221001220101 - 2¹⁵ = 221001187333 is a prime.

It is a super-2 number, since 2×221001220101² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001220103) 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, 898378821 + ... + 898379066.

It is an arithmetic number, because the mean of its divisors is an integer number (37731915648).

Almost surely, 2^221001220101 is an apocalyptic number.

It is an amenable number.

221001220101 is a deficient number, since it is larger than the sum of its proper divisors (80854105083).

221001220101 is a wasteful number, since it uses less digits than its factorization.

221001220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796757931.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221001220101 its reverse (101022100122), we get a palindrome (322023320223).

The spelling of 221001220101 in words is "two hundred twenty-one billion, one million, two hundred twenty thousand, one hundred one".