121210245 has 24 divisors (see below), whose sum is σ = 226260216. Its totient is φ = 59672448.

The previous prime is 121210237. The next prime is 121210333. The reversal of 121210245 is 542012121.

It can be written as a sum of positive squares in 4 ways, for example, as 11840481 + 109369764 = 3441^2 + 10458^2 .

It is not a de Polignac number, because 121210245 - 2³ = 121210237 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 103014 + ... + 104183.

It is an arithmetic number, because the mean of its divisors is an integer number (9427509).

Almost surely, 2^121210245 is an apocalyptic number.

121210245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121210245 is a deficient number, since it is larger than the sum of its proper divisors (105049971).

121210245 is a wasteful number, since it uses less digits than its factorization.

121210245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207221 (or 207218 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 121210245 is about 11009.5524432195. The cubic root of 121210245 is about 494.8950496814.

Adding to 121210245 its reverse (542012121), we get a palindrome (663222366).

The spelling of 121210245 in words is "one hundred twenty-one million, two hundred ten thousand, two hundred forty-five".