121553223 has 8 divisors (see below), whose sum is σ = 176804736. Its totient is φ = 73668600.

The previous prime is 121553219. The next prime is 121553227. The reversal of 121553223 is 322355121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121553219) and next prime (121553227).

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

It is not a de Polignac number, because 121553223 - 2² = 121553219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121553193 and 121553202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121553227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1841683 + ... + 1841748.

It is an arithmetic number, because the mean of its divisors is an integer number (22100592).

Almost surely, 2^121553223 is an apocalyptic number.

121553223 is a deficient number, since it is larger than the sum of its proper divisors (55251513).

121553223 is a wasteful number, since it uses less digits than its factorization.

121553223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3683445.

The product of its digits is 1800, while the sum is 24.

The square root of 121553223 is about 11025.1178224997. The cubic root of 121553223 is about 495.3613971365.

The spelling of 121553223 in words is "one hundred twenty-one million, five hundred fifty-three thousand, two hundred twenty-three".