102707221 has 2 divisors, whose sum is σ = 102707222. Its totient is φ = 102707220.

The previous prime is 102707219. The next prime is 102707233. The reversal of 102707221 is 122707201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92910321 + 9796900 = 9639^2 + 3130^2 .

It is a cyclic number.

It is not a de Polignac number, because 102707221 - 2¹ = 102707219 is a prime.

Together with 102707219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 102707192 and 102707201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102707201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51353610 + 51353611.

It is an arithmetic number, because the mean of its divisors is an integer number (51353611).

Almost surely, 2^102707221 is an apocalyptic number.

It is an amenable number.

102707221 is a deficient number, since it is larger than the sum of its proper divisors (1).

102707221 is an equidigital number, since it uses as much as digits as its factorization.

102707221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 102707221 is about 10134.4571142218. The cubic root of 102707221 is about 468.3102458052.

The spelling of 102707221 in words is "one hundred two million, seven hundred seven thousand, two hundred twenty-one".