221011020023 has 2 divisors, whose sum is σ = 221011020024. Its totient is φ = 221011020022.

The previous prime is 221011020011. The next prime is 221011020049. The reversal of 221011020023 is 320020110122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221011020023 - 2¹⁶ = 221010954487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221011020073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505510011 + 110505510012.

It is an arithmetic number, because the mean of its divisors is an integer number (110505510012).

Almost surely, 2^221011020023 is an apocalyptic number.

221011020023 is a deficient number, since it is larger than the sum of its proper divisors (1).

221011020023 is an equidigital number, since it uses as much as digits as its factorization.

221011020023 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 221011020023 its reverse (320020110122), we get a palindrome (541031130145).

Subtracting 221011020023 from its reverse (320020110122), we obtain a palindrome (99009090099).

The spelling of 221011020023 in words is "two hundred twenty-one billion, eleven million, twenty thousand, twenty-three".