121143615 has 16 divisors (see below), whose sum is σ = 205231968. Its totient is φ = 60809216.

The previous prime is 121143613. The next prime is 121143619. The reversal of 121143615 is 516341121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121143615 - 2¹ = 121143613 is a prime.

It is a super-3 number, since 3×121143615³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121143611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237282 + ... + 237791.

It is an arithmetic number, because the mean of its divisors is an integer number (12826998).

Almost surely, 2^121143615 is an apocalyptic number.

121143615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121143615 is a deficient number, since it is larger than the sum of its proper divisors (84088353).

121143615 is a wasteful number, since it uses less digits than its factorization.

121143615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475098.

The product of its digits is 720, while the sum is 24.

The square root of 121143615 is about 11006.5260186855. The cubic root of 121143615 is about 494.8043507992.

Adding to 121143615 its reverse (516341121), we get a palindrome (637484736).

The spelling of 121143615 in words is "one hundred twenty-one million, one hundred forty-three thousand, six hundred fifteen".