121552215 has 32 divisors (see below), whose sum is σ = 210270720. Its totient is φ = 59750784.

The previous prime is 121552183. The next prime is 121552241. The reversal of 121552215 is 512255121.

It is not a de Polignac number, because 121552215 - 2⁵ = 121552183 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 4782 + ... + 16308.

It is an arithmetic number, because the mean of its divisors is an integer number (6570960).

Almost surely, 2^121552215 is an apocalyptic number.

121552215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121552215 is a deficient number, since it is larger than the sum of its proper divisors (88718505).

121552215 is a wasteful number, since it uses less digits than its factorization.

121552215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11591.

The product of its digits is 1000, while the sum is 24.

The square root of 121552215 is about 11025.0721086077. The cubic root of 121552215 is about 495.3600278442.

It can be divided in two parts, 1215 and 52215, that multiplied together give a square (63441225 = 7965²).

The spelling of 121552215 in words is "one hundred twenty-one million, five hundred fifty-two thousand, two hundred fifteen".