121145072 has 10 divisors (see below), whose sum is σ = 234718608. Its totient is φ = 60572528.

The previous prime is 121145053. The next prime is 121145131. The reversal of 121145072 is 270541121.

It is a super-3 number, since 3×121145072³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 as a sum of consecutive naturals, namely, 3785768 + ... + 3785799.

Almost surely, 2^121145072 is an apocalyptic number.

It is an amenable number.

121145072 is a deficient number, since it is larger than the sum of its proper divisors (113573536).

121145072 is an equidigital number, since it uses as much as digits as its factorization.

121145072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7571575 (or 7571569 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 121145072 is about 11006.5922064915. The cubic root of 121145072 is about 494.8063344698.

Adding to 121145072 its reverse (270541121), we get a palindrome (391686193).

The spelling of 121145072 in words is "one hundred twenty-one million, one hundred forty-five thousand, seventy-two".