221101021011011 has 16 divisors (see below), whose sum is σ = 223746957158400. Its totient is φ = 218464386595200.

The previous prime is 221101021010921. The next prime is 221101021011029. The reversal of 221101021011011 is 110110120101122.

It is a cyclic number.

It is not a de Polignac number, because 221101021011011 - 2¹⁰ = 221101021009987 is a prime.

It is a super-2 number, since 2×221101021011011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221101021011511) 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, 127682366 + ... + 129402428.

It is an arithmetic number, because the mean of its divisors is an integer number (13984184822400).

Almost surely, 2^{221101021011011} is an apocalyptic number.

221101021011011 is a deficient number, since it is larger than the sum of its proper divisors (2645936147389).

221101021011011 is a wasteful number, since it uses less digits than its factorization.

221101021011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722766.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 221101021011011 its reverse (110110120101122), we get a palindrome (331211141112133).

The spelling of 221101021011011 in words is "two hundred twenty-one trillion, one hundred one billion, twenty-one million, eleven thousand, eleven".