221202022901 has 2 divisors, whose sum is σ = 221202022902. Its totient is φ = 221202022900.

The previous prime is 221202022897. The next prime is 221202022919. The reversal of 221202022901 is 109220202122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121724232100 + 99477790801 = 348890^2 + 315401^2 .

It is a cyclic number.

It is not a de Polignac number, because 221202022901 - 2² = 221202022897 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221202012901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110601011450 + 110601011451.

It is an arithmetic number, because the mean of its divisors is an integer number (110601011451).

Almost surely, 2^221202022901 is an apocalyptic number.

It is an amenable number.

221202022901 is a deficient number, since it is larger than the sum of its proper divisors (1).

221202022901 is an equidigital number, since it uses as much as digits as its factorization.

221202022901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 221202022901 in words is "two hundred twenty-one billion, two hundred two million, twenty-two thousand, nine hundred one".