102707021 has 2 divisors, whose sum is σ = 102707022. Its totient is φ = 102707020.

The previous prime is 102706997. The next prime is 102707063. The reversal of 102707021 is 120707201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52722121 + 49984900 = 7261^2 + 7070^2 .

It is an emirp because it is prime and its reverse (120707201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102707021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102706984 and 102707002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102707071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51353510 + 51353511.

It is an arithmetic number, because the mean of its divisors is an integer number (51353511).

Almost surely, 2^102707021 is an apocalyptic number.

It is an amenable number.

102707021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102707021 is an equidigital number, since it uses as much as digits as its factorization.

102707021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 102707021 is about 10134.4472468902. The cubic root of 102707021 is about 468.3099418275.

The spelling of 102707021 in words is "one hundred two million, seven hundred seven thousand, twenty-one".