221001210021101 has 8 divisors (see below), whose sum is σ = 234051897960384. Its totient is φ = 208237350388320.

The previous prime is 221001210021083. The next prime is 221001210021103. The reversal of 221001210021101 is 101120012100122.

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 221001210021101 - 2⁶ = 221001210021037 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 (221001210021103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71707075040 + ... + 71707078121.

It is an arithmetic number, because the mean of its divisors is an integer number (29256487245048).

Almost surely, 2^{221001210021101} is an apocalyptic number.

It is an amenable number.

221001210021101 is a deficient number, since it is larger than the sum of its proper divisors (13050687939283).

221001210021101 is a wasteful number, since it uses less digits than its factorization.

221001210021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143414153251.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221001210021101 its reverse (101120012100122), we get a palindrome (322121222121223).

The spelling of 221001210021101 in words is "two hundred twenty-one trillion, one billion, two hundred ten million, twenty-one thousand, one hundred one".