221012321011 has 2 divisors, whose sum is σ = 221012321012. Its totient is φ = 221012321010.

The previous prime is 221012321009. The next prime is 221012321069. The reversal of 221012321011 is 110123210122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221012321011 - 2¹ = 221012321009 is a prime.

Together with 221012321009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221012321081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506160505 + 110506160506.

It is an arithmetic number, because the mean of its divisors is an integer number (110506160506).

Almost surely, 2^221012321011 is an apocalyptic number.

221012321011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012321011 is an equidigital number, since it uses as much as digits as its factorization.

221012321011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 221012321011 its reverse (110123210122), we get a palindrome (331135531133).

The spelling of 221012321011 in words is "two hundred twenty-one billion, twelve million, three hundred twenty-one thousand, eleven".