121571150729 has 16 divisors (see below), whose sum is σ = 141560992128. Its totient is φ = 102249050112.

The previous prime is 121571150719. The next prime is 121571150791. The reversal of 121571150729 is 927051175121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121571150729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121571150719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383774 + ... + 624839.

It is an arithmetic number, because the mean of its divisors is an integer number (8847562008).

Almost surely, 2^121571150729 is an apocalyptic number.

It is an amenable number.

121571150729 is a deficient number, since it is larger than the sum of its proper divisors (19989841399).

121571150729 is a wasteful number, since it uses less digits than its factorization.

121571150729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008944.

The product of its (nonzero) digits is 44100, while the sum is 41.

The spelling of 121571150729 in words is "one hundred twenty-one billion, five hundred seventy-one million, one hundred fifty thousand, seven hundred twenty-nine".