121203215 has 48 divisors (see below), whose sum is σ = 178967232. Its totient is φ = 78414336.

The previous prime is 121203193. The next prime is 121203347. The reversal of 121203215 is 512302121.

It is a happy number.

It is not a de Polignac number, because 121203215 - 2¹⁴ = 121186831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121203193 and 121203202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 771917 + ... + 772073.

It is an arithmetic number, because the mean of its divisors is an integer number (3728484).

Almost surely, 2^121203215 is an apocalyptic number.

121203215 is a deficient number, since it is larger than the sum of its proper divisors (57764017).

121203215 is a wasteful number, since it uses less digits than its factorization.

121203215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 121203215 is about 11009.2331703893. The cubic root of 121203215 is about 494.8854817897.

Adding to 121203215 its reverse (512302121), we get a palindrome (633505336).

The spelling of 121203215 in words is "one hundred twenty-one million, two hundred three thousand, two hundred fifteen".