121161078724 has 135 divisors (see below), whose sum is σ = 263463760623. Its totient is φ = 48611739792.

The previous prime is 121161078697. The next prime is 121161078733. The reversal of 121161078724 is 427870161121.

It is a happy number.

The square root of 121161078724 is 348082.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 2577895269 + ... + 2577895315.

Almost surely, 2^121161078724 is an apocalyptic number.

121161078724 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

121161078724 is the 348082-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121161078724

121161078724 is an abundant number, since it is smaller than the sum of its proper divisors (142302681899).

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

121161078724 is an frugal number, since it uses more digits than its factorization.

121161078724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 40.

The spelling of 121161078724 in words is "one hundred twenty-one billion, one hundred sixty-one million, seventy-eight thousand, seven hundred twenty-four".