221001276676601 has 2 divisors, whose sum is σ = 221001276676602. Its totient is φ = 221001276676600.

The previous prime is 221001276676597. The next prime is 221001276676603. The reversal of 221001276676601 is 106676672100122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207214729452025 + 13786547224576 = 14394955^2 + 3713024^2 .

It is a cyclic number.

It is not a de Polignac number, because 221001276676601 - 2² = 221001276676597 is a prime.

Together with 221001276676603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221001276676603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500638338300 + 110500638338301.

It is an arithmetic number, because the mean of its divisors is an integer number (110500638338301).

Almost surely, 2^{221001276676601} is an apocalyptic number.

It is an amenable number.

221001276676601 is a deficient number, since it is larger than the sum of its proper divisors (1).

221001276676601 is an equidigital number, since it uses as much as digits as its factorization.

221001276676601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 221001276676601 in words is "two hundred twenty-one trillion, one billion, two hundred seventy-six million, six hundred seventy-six thousand, six hundred one".