121420515 has 16 divisors (see below), whose sum is σ = 194781600. Its totient is φ = 64588032.

The previous prime is 121420501. The next prime is 121420553. The reversal of 121420515 is 515024121.

It is not a de Polignac number, because 121420515 - 2¹⁴ = 121404131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121420491 and 121420500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4570 + ... + 16239.

It is an arithmetic number, because the mean of its divisors is an integer number (12173850).

Almost surely, 2^121420515 is an apocalyptic number.

121420515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121420515 is a deficient number, since it is larger than the sum of its proper divisors (73361085).

121420515 is a wasteful number, since it uses less digits than its factorization.

121420515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21206.

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

The square root of 121420515 is about 11019.0977398333. The cubic root of 121420515 is about 495.1810581406.

Adding to 121420515 its reverse (515024121), we get a palindrome (636444636).

The spelling of 121420515 in words is "one hundred twenty-one million, four hundred twenty thousand, five hundred fifteen".