121155315 has 16 divisors (see below), whose sum is σ = 193988256. Its totient is φ = 64569600.

The previous prime is 121155313. The next prime is 121155317. The reversal of 121155315 is 513551121.

It is an interprime number because it is at equal distance from previous prime (121155313) and next prime (121155317).

It is not a de Polignac number, because 121155315 - 2¹ = 121155313 is a prime.

It is a super-2 number, since 2×121155315² = 29357220705498450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121155313) by changing a digit.

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, 32445 + ... + 35985.

It is an arithmetic number, because the mean of its divisors is an integer number (12124266).

Almost surely, 2^121155315 is an apocalyptic number.

121155315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121155315 is a deficient number, since it is larger than the sum of its proper divisors (72832941).

121155315 is a wasteful number, since it uses less digits than its factorization.

121155315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830.

The product of its digits is 750, while the sum is 24.

The square root of 121155315 is about 11007.0575087078. The cubic root of 121155315 is about 494.8202796193.

The spelling of 121155315 in words is "one hundred twenty-one million, one hundred fifty-five thousand, three hundred fifteen".