101221102061 has 2 divisors, whose sum is σ = 101221102062. Its totient is φ = 101221102060.

The previous prime is 101221102033. The next prime is 101221102079. The reversal of 101221102061 is 160201122101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98025348100 + 3195753961 = 313090^2 + 56531^2 .

It is a cyclic number.

It is not a de Polignac number, because 101221102061 - 2⁶ = 101221101997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101221101061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610551030 + 50610551031.

It is an arithmetic number, because the mean of its divisors is an integer number (50610551031).

Almost surely, 2^101221102061 is an apocalyptic number.

It is an amenable number.

101221102061 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221102061 is an equidigital number, since it uses as much as digits as its factorization.

101221102061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 101221102061 its reverse (160201122101), we get a palindrome (261422224162).

The spelling of 101221102061 in words is "one hundred one billion, two hundred twenty-one million, one hundred two thousand, sixty-one".