101227721461 has 2 divisors, whose sum is σ = 101227721462. Its totient is φ = 101227721460.

The previous prime is 101227721459. The next prime is 101227721503. The reversal of 101227721461 is 164127722101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91328466436 + 9899255025 = 302206^2 + 99495^2 .

It is a cyclic number.

It is not a de Polignac number, because 101227721461 - 2¹ = 101227721459 is a prime.

Together with 101227721459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101227721261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50613860730 + 50613860731.

It is an arithmetic number, because the mean of its divisors is an integer number (50613860731).

Almost surely, 2^101227721461 is an apocalyptic number.

It is an amenable number.

101227721461 is a deficient number, since it is larger than the sum of its proper divisors (1).

101227721461 is an equidigital number, since it uses as much as digits as its factorization.

101227721461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 34.

The spelling of 101227721461 in words is "one hundred one billion, two hundred twenty-seven million, seven hundred twenty-one thousand, four hundred sixty-one".