121550653 has 8 divisors (see below), whose sum is σ = 144955008. Its totient is φ = 99656304.

The previous prime is 121550641. The next prime is 121550707. The reversal of 121550653 is 356055121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121550653 is a prime.

It is a super-2 number, since 2×121550653² = 29549122489452818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121550633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377326 + ... + 377647.

It is an arithmetic number, because the mean of its divisors is an integer number (18119376).

Almost surely, 2^121550653 is an apocalyptic number.

It is an amenable number.

121550653 is a deficient number, since it is larger than the sum of its proper divisors (23404355).

121550653 is an equidigital number, since it uses as much as digits as its factorization.

121550653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755003.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 121550653 is about 11025.0012698412. The cubic root of 121550653 is about 495.3579059696.

Subtracting from 121550653 its sum of digits (28), we obtain a 4-th power (121550625 = 105⁴).

The spelling of 121550653 in words is "one hundred twenty-one million, five hundred fifty thousand, six hundred fifty-three".