221001002021101 has 32 divisors (see below), whose sum is σ = 223883362160640. Its totient is φ = 218143992652800.

The previous prime is 221001002021069. The next prime is 221001002021119. The reversal of 221001002021101 is 101120200100122.

It is a cyclic number.

It is not a de Polignac number, because 221001002021101 - 2⁵ = 221001002021069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001002021161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29732406081 + ... + 29732413513.

It is an arithmetic number, because the mean of its divisors is an integer number (6996355067520).

Almost surely, 2^{221001002021101} is an apocalyptic number.

It is an amenable number.

221001002021101 is a deficient number, since it is larger than the sum of its proper divisors (2882360139539).

221001002021101 is a wasteful number, since it uses less digits than its factorization.

221001002021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10077.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221001002021101 its reverse (101120200100122), we get a palindrome (322121202121223).

The spelling of 221001002021101 in words is "two hundred twenty-one trillion, one billion, two million, twenty-one thousand, one hundred one".