121515135166 has 8 divisors (see below), whose sum is σ = 182280239784. Its totient is φ = 60755055240.

The previous prime is 121515135121. The next prime is 121515135169. The reversal of 121515135166 is 661531515121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×121515135166² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121515135169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1195120 + ... + 1292803.

It is an arithmetic number, because the mean of its divisors is an integer number (22785029973).

Almost surely, 2^121515135166 is an apocalyptic number.

121515135166 is a deficient number, since it is larger than the sum of its proper divisors (60765104618).

121515135166 is a wasteful number, since it uses less digits than its factorization.

121515135166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512346.

The product of its digits is 27000, while the sum is 37.

The spelling of 121515135166 in words is "one hundred twenty-one billion, five hundred fifteen million, one hundred thirty-five thousand, one hundred sixty-six".