121243508 has 6 divisors (see below), whose sum is σ = 212176146. Its totient is φ = 60621752.

The previous prime is 121243481. The next prime is 121243523. The reversal of 121243508 is 805342121.

It can be written as a sum of positive squares in only one way, i.e., 116035984 + 5207524 = 10772^2 + 2282^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15155435 + ... + 15155442.

It is an arithmetic number, because the mean of its divisors is an integer number (35362691).

Almost surely, 2^121243508 is an apocalyptic number.

It is an amenable number.

121243508 is a deficient number, since it is larger than the sum of its proper divisors (90932638).

121243508 is a wasteful number, since it uses less digits than its factorization.

121243508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30310881 (or 30310879 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 121243508 is about 11011.0629822919. The cubic root of 121243508 is about 494.9403159002.

Adding to 121243508 its reverse (805342121), we get a palindrome (926585629).

The spelling of 121243508 in words is "one hundred twenty-one million, two hundred forty-three thousand, five hundred eight".