221135298101 has 2 divisors, whose sum is σ = 221135298102. Its totient is φ = 221135298100.

The previous prime is 221135298029. The next prime is 221135298151. The reversal of 221135298101 is 101892531122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209846448100 + 11288850001 = 458090^2 + 106249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221135298101 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221135298151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110567649050 + 110567649051.

It is an arithmetic number, because the mean of its divisors is an integer number (110567649051).

Almost surely, 2^221135298101 is an apocalyptic number.

It is an amenable number.

221135298101 is a deficient number, since it is larger than the sum of its proper divisors (1).

221135298101 is an equidigital number, since it uses as much as digits as its factorization.

221135298101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 35.

The spelling of 221135298101 in words is "two hundred twenty-one billion, one hundred thirty-five million, two hundred ninety-eight thousand, one hundred one".