210102427 has 2 divisors, whose sum is σ = 210102428. Its totient is φ = 210102426.

The previous prime is 210102421. The next prime is 210102449. The reversal of 210102427 is 724201012.

It is a happy number.

210102427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210102427 is a prime.

It is not a weakly prime, because it can be changed into another prime (210102421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105051213 + 105051214.

It is an arithmetic number, because the mean of its divisors is an integer number (105051214).

Almost surely, 2^210102427 is an apocalyptic number.

210102427 is a deficient number, since it is larger than the sum of its proper divisors (1).

210102427 is an equidigital number, since it uses as much as digits as its factorization.

210102427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 210102427 is about 14494.9103826136. The cubic root of 210102427 is about 594.4888173616.

Adding to 210102427 its reverse (724201012), we get a palindrome (934303439).

The spelling of 210102427 in words is "two hundred ten million, one hundred two thousand, four hundred twenty-seven".