221211220011 has 8 divisors (see below), whose sum is σ = 301807556160. Its totient is φ = 144044515272.

The previous prime is 221211219961. The next prime is 221211220031. The reversal of 221211220011 is 110022112122.

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

It is not a de Polignac number, because 221211220011 - 2¹⁷ = 221211088939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221211220031) 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, 857407701 + ... + 857407958.

It is an arithmetic number, because the mean of its divisors is an integer number (37725944520).

Almost surely, 2^221211220011 is an apocalyptic number.

221211220011 is a deficient number, since it is larger than the sum of its proper divisors (80596336149).

221211220011 is a wasteful number, since it uses less digits than its factorization.

221211220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714815705.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221211220011 its reverse (110022112122), we get a palindrome (331233332133).

The spelling of 221211220011 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, eleven".