221000101211 has 16 divisors (see below), whose sum is σ = 231390794880. Its totient is φ = 210854814720.

The previous prime is 221000101183. The next prime is 221000101291. The reversal of 221000101211 is 112101000122.

It is a cyclic number.

It is not a de Polignac number, because 221000101211 - 2²² = 220995906907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221000101192 and 221000101201.

It is not an unprimeable number, because it can be changed into a prime (221000101291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2415875 + ... + 2505683.

It is an arithmetic number, because the mean of its divisors is an integer number (14461924680).

Almost surely, 2^221000101211 is an apocalyptic number.

221000101211 is a deficient number, since it is larger than the sum of its proper divisors (10390693669).

221000101211 is a wasteful number, since it uses less digits than its factorization.

221000101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91174.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221000101211 its reverse (112101000122), we get a palindrome (333101101333).

The spelling of 221000101211 in words is "two hundred twenty-one billion, one hundred one thousand, two hundred eleven".