121212250 has 32 divisors (see below), whose sum is σ = 227784960. Its totient is φ = 48298000.

The previous prime is 121212209. The next prime is 121212253. The reversal of 121212250 is 52212121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76971 + ... + 78529.

It is an arithmetic number, because the mean of its divisors is an integer number (7118280).

Almost surely, 2^121212250 is an apocalyptic number.

121212250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121212250 is a deficient number, since it is larger than the sum of its proper divisors (106572710).

121212250 is a wasteful number, since it uses less digits than its factorization.

121212250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887 (or 1877 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 121212250 is about 11009.6435001321. The cubic root of 121212250 is about 494.8977784361.

Adding to 121212250 its reverse (52212121), we get a palindrome (173424371).

The spelling of 121212250 in words is "one hundred twenty-one million, two hundred twelve thousand, two hundred fifty".