221211211101 has 8 divisors (see below), whose sum is σ = 297101189184. Its totient is φ = 146397686880.

The previous prime is 221211211093. The next prime is 221211211103. The reversal of 221211211101 is 101112112122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221211211101 - 2³ = 221211211093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211211103) 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, 269112985 + ... + 269113806.

It is an arithmetic number, because the mean of its divisors is an integer number (37137648648).

Almost surely, 2^221211211101 is an apocalyptic number.

It is an amenable number.

221211211101 is a deficient number, since it is larger than the sum of its proper divisors (75889978083).

221211211101 is a wasteful number, since it uses less digits than its factorization.

221211211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538226931.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221211211101 its reverse (101112112122), we get a palindrome (322323323223).

The spelling of 221211211101 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred eleven thousand, one hundred one".