121241772 has 30 divisors (see below), whose sum is σ = 316950788. Its totient is φ = 40413816.

The previous prime is 121241767. The next prime is 121241789. The reversal of 121241772 is 277142121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 186778 + ... + 187425.

Almost surely, 2^121241772 is an apocalyptic number.

121241772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121241772 is an abundant number, since it is smaller than the sum of its proper divisors (195709016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121241772 is a wasteful number, since it uses less digits than its factorization.

121241772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374219 (or 374208 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 121241772 is about 11010.9841522000. The cubic root of 121241772 is about 494.9379536556.

Adding to 121241772 its reverse (277142121), we get a palindrome (398383893).

The spelling of 121241772 in words is "one hundred twenty-one million, two hundred forty-one thousand, seven hundred seventy-two".