101221273 has 2 divisors, whose sum is σ = 101221274. Its totient is φ = 101221272.

The previous prime is 101221259. The next prime is 101221279. The reversal of 101221273 is 372122101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88604569 + 12616704 = 9413^2 + 3552^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101221273 is a prime.

It is a super-2 number, since 2×101221273² = 20491492215481058, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 101221273.

It is not a weakly prime, because it can be changed into another prime (101221279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610636 + 50610637.

It is an arithmetic number, because the mean of its divisors is an integer number (50610637).

Almost surely, 2^101221273 is an apocalyptic number.

It is an amenable number.

101221273 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221273 is an equidigital number, since it uses as much as digits as its factorization.

101221273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 101221273 is about 10060.8783413776. The cubic root of 101221273 is about 466.0407919862.

Adding to 101221273 its reverse (372122101), we get a palindrome (473343374).

The spelling of 101221273 in words is "one hundred one million, two hundred twenty-one thousand, two hundred seventy-three".