221221211010101 has 8 divisors (see below), whose sum is σ = 221248091490624. Its totient is φ = 221194331205120.

The previous prime is 221221211010091. The next prime is 221221211010157. The reversal of 221221211010101 is 101010112122122.

221221211010101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221221211010101 - 2²⁶ = 221221143901237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221221211010101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221211010181) 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, 1003948400 + ... + 1004168726.

It is an arithmetic number, because the mean of its divisors is an integer number (27656011436328).

Almost surely, 2^{221221211010101} is an apocalyptic number.

It is an amenable number.

221221211010101 is a deficient number, since it is larger than the sum of its proper divisors (26880480523).

221221211010101 is a wasteful number, since it uses less digits than its factorization.

221221211010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337771.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221221211010101 its reverse (101010112122122), we get a palindrome (322231323132223).

The spelling of 221221211010101 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred eleven million, ten thousand, one hundred one".