221012111011 has 8 divisors (see below), whose sum is σ = 232651773200. Its totient is φ = 209373193440.

The previous prime is 221012110829. The next prime is 221012111039. The reversal of 221012111011 is 110111210122.

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 221012111011 - 2²⁹ = 220475240099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221012110982 and 221012111000.

It is not an unprimeable number, because it can be changed into a prime (221012111051) 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, 485221 + ... + 823081.

It is an arithmetic number, because the mean of its divisors is an integer number (29081471650).

Almost surely, 2^221012111011 is an apocalyptic number.

221012111011 is a deficient number, since it is larger than the sum of its proper divisors (11639662189).

221012111011 is a wasteful number, since it uses less digits than its factorization.

221012111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372309.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221012111011 its reverse (110111210122), we get a palindrome (331123321133).

The spelling of 221012111011 in words is "two hundred twenty-one billion, twelve million, one hundred eleven thousand, eleven".