221123132011 has 2 divisors, whose sum is σ = 221123132012. Its totient is φ = 221123132010.

The previous prime is 221123131981. The next prime is 221123132047. The reversal of 221123132011 is 110231321122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221123132011 - 2³³ = 212533197419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221123132011.

It is not a weakly prime, because it can be changed into another prime (221123132611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110561566005 + 110561566006.

It is an arithmetic number, because the mean of its divisors is an integer number (110561566006).

Almost surely, 2^221123132011 is an apocalyptic number.

221123132011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221123132011 is an equidigital number, since it uses as much as digits as its factorization.

221123132011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221123132011 its reverse (110231321122), we get a palindrome (331354453133).

The spelling of 221123132011 in words is "two hundred twenty-one billion, one hundred twenty-three million, one hundred thirty-two thousand, eleven".