121005188164 has 27 divisors (see below), whose sum is σ = 246341904543. Its totient is φ = 51857279208.

The previous prime is 121005188159. The next prime is 121005188179. The reversal of 121005188164 is 461881500121.

The square root of 121005188164 is 347858.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4857589 + ... + 4882435.

Almost surely, 2^121005188164 is an apocalyptic number.

121005188164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

121005188164 is the 347858-th square number.

It is an amenable number.

121005188164 is an abundant number, since it is smaller than the sum of its proper divisors (125336716379).

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

121005188164 is an frugal number, since it uses more digits than its factorization.

121005188164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49712 (or 24856 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 37.

Adding to 121005188164 its reverse (461881500121), we get a palindrome (582886688285).

The spelling of 121005188164 in words is "one hundred twenty-one billion, five million, one hundred eighty-eight thousand, one hundred sixty-four".