121031072 has 24 divisors (see below), whose sum is σ = 239526756. Its totient is φ = 60198912.

The previous prime is 121031069. The next prime is 121031089. The reversal of 121031072 is 270130121.

It can be written as a sum of positive squares in 2 ways, for example, as 116553616 + 4477456 = 10796^2 + 2116^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121031072.

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 3 ways as a sum of consecutive naturals, for example, 3623 + ... + 15974.

Almost surely, 2^121031072 is an apocalyptic number.

It is an amenable number.

121031072 is a deficient number, since it is larger than the sum of its proper divisors (118495684).

121031072 is a wasteful number, since it uses less digits than its factorization.

121031072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19800 (or 19792 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 121031072 is about 11001.4122729766. The cubic root of 121031072 is about 494.6510781199.

Adding to 121031072 its reverse (270130121), we get a palindrome (391161193).

The spelling of 121031072 in words is "one hundred twenty-one million, thirty-one thousand, seventy-two".