121166181552 has 80 divisors (see below), whose sum is σ = 337159198208. Its totient is φ = 37274307840.

The previous prime is 121166181547. The next prime is 121166181553. The reversal of 121166181552 is 255181661121.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 121166181552.

It is not an unprimeable number, because it can be changed into a prime (121166181553) 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, 3566727 + ... + 3600537.

Almost surely, 2^121166181552 is an apocalyptic number.

121166181552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121166181552 is an abundant number, since it is smaller than the sum of its proper divisors (215993016656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121166181552 is a wasteful number, since it uses less digits than its factorization.

121166181552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39578 (or 39572 counting only the distinct ones).

The product of its digits is 28800, while the sum is 39.

The spelling of 121166181552 in words is "one hundred twenty-one billion, one hundred sixty-six million, one hundred eighty-one thousand, five hundred fifty-two".