121045215 has 32 divisors (see below), whose sum is σ = 201206016. Its totient is φ = 62092800.

The previous prime is 121045193. The next prime is 121045229. The reversal of 121045215 is 512540121.

It is not a de Polignac number, because 121045215 - 2⁷ = 121045087 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121045191 and 121045200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41815 + ... + 44615.

It is an arithmetic number, because the mean of its divisors is an integer number (6287688).

Almost surely, 2^121045215 is an apocalyptic number.

121045215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121045215 is a deficient number, since it is larger than the sum of its proper divisors (80160801).

121045215 is a wasteful number, since it uses less digits than its factorization.

121045215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2919.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 121045215 is about 11002.0550353104. The cubic root of 121045215 is about 494.6703447363.

Adding to 121045215 its reverse (512540121), we get a palindrome (633585336).

The spelling of 121045215 in words is "one hundred twenty-one million, forty-five thousand, two hundred fifteen".