102721007 has 2 divisors, whose sum is σ = 102721008. Its totient is φ = 102721006.

The previous prime is 102720979. The next prime is 102721009. The reversal of 102721007 is 700127201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102721007 - 2¹⁰ = 102719983 is a prime.

Together with 102721009, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102721007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102721009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51360503 + 51360504.

It is an arithmetic number, because the mean of its divisors is an integer number (51360504).

Almost surely, 2^102721007 is an apocalyptic number.

102721007 is a deficient number, since it is larger than the sum of its proper divisors (1).

102721007 is an equidigital number, since it uses as much as digits as its factorization.

102721007 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 102721007 is about 10135.1372462340. The cubic root of 102721007 is about 468.3311980360.

Adding to 102721007 its reverse (700127201), we get a palindrome (802848208).

The spelling of 102721007 in words is "one hundred two million, seven hundred twenty-one thousand, seven".