221020032011 has 2 divisors, whose sum is σ = 221020032012. Its totient is φ = 221020032010.

The previous prime is 221020031963. The next prime is 221020032019. The reversal of 221020032011 is 110230020122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221020032011 - 2¹⁴ = 221020015627 is a prime.

It is not a weakly prime, because it can be changed into another prime (221020032019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510016005 + 110510016006.

It is an arithmetic number, because the mean of its divisors is an integer number (110510016006).

Almost surely, 2^221020032011 is an apocalyptic number.

221020032011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020032011 is an equidigital number, since it uses as much as digits as its factorization.

221020032011 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 14.

Adding to 221020032011 its reverse (110230020122), we get a palindrome (331250052133).

The spelling of 221020032011 in words is "two hundred twenty-one billion, twenty million, thirty-two thousand, eleven".