221011123311 has 48 divisors (see below), whose sum is σ = 358004937888. Its totient is φ = 130204800000.

The previous prime is 221011123303. The next prime is 221011123313. The reversal of 221011123311 is 113321110122.

221011123311 is a `hidden beast` number, since 221 + 0 + 1 + 112 + 331 + 1 = 666.

It is not a de Polignac number, because 221011123311 - 2³ = 221011123303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221011123313) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3990811 + ... + 4045811.

It is an arithmetic number, because the mean of its divisors is an integer number (7458436206).

Almost surely, 2^221011123311 is an apocalyptic number.

221011123311 is a deficient number, since it is larger than the sum of its proper divisors (136993814577).

221011123311 is a wasteful number, since it uses less digits than its factorization.

221011123311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56152 (or 56149 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 221011123311 its reverse (113321110122), we get a palindrome (334332233433).

The spelling of 221011123311 in words is "two hundred twenty-one billion, eleven million, one hundred twenty-three thousand, three hundred eleven".