102121249 has 4 divisors (see below), whose sum is σ = 102156336. Its totient is φ = 102086164.

The previous prime is 102121247. The next prime is 102121273. The reversal of 102121249 is 942121201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102121249 - 2¹ = 102121247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102121247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12739 + ... + 19144.

It is an arithmetic number, because the mean of its divisors is an integer number (25539084).

Almost surely, 2^102121249 is an apocalyptic number.

It is an amenable number.

102121249 is a deficient number, since it is larger than the sum of its proper divisors (35087).

102121249 is an equidigital number, since it uses as much as digits as its factorization.

102121249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35086.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 102121249 is about 10105.5058755116. The cubic root of 102121249 is about 467.4179352077.

The spelling of 102121249 in words is "one hundred two million, one hundred twenty-one thousand, two hundred forty-nine".