121155633 has 6 divisors (see below), whose sum is σ = 175002594. Its totient is φ = 80770416.

The previous prime is 121155623. The next prime is 121155637. The reversal of 121155633 is 336551121.

121155633 is a `hidden beast` number, since 1 + 21 + 1 + 5 + 5 + 633 = 666.

It can be written as a sum of positive squares in only one way, i.e., 112529664 + 8625969 = 10608^2 + 2937^2 .

It is not a de Polignac number, because 121155633 - 2¹³ = 121147441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121155597 and 121155606.

It is not an unprimeable number, because it can be changed into a prime (121155637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6730860 + ... + 6730877.

It is an arithmetic number, because the mean of its divisors is an integer number (29167099).

Almost surely, 2^121155633 is an apocalyptic number.

It is an amenable number.

121155633 is a deficient number, since it is larger than the sum of its proper divisors (53846961).

121155633 is a wasteful number, since it uses less digits than its factorization.

121155633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13461743 (or 13461740 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 121155633 is about 11007.0719539758. The cubic root of 121155633 is about 494.8207125422.

The spelling of 121155633 in words is "one hundred twenty-one million, one hundred fifty-five thousand, six hundred thirty-three".