121363747129 has 9 divisors (see below), whose sum is σ = 121893129189. Its totient is φ = 120836658780.

The previous prime is 121363747123. The next prime is 121363747181. The reversal of 121363747129 is 921747363121.

The square root of 121363747129 is 348373.

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

It is a de Polignac number, because none of the positive numbers 2^k-121363747129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121363747123) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 98588944 + ... + 98590174.

It is an arithmetic number, because the mean of its divisors is an integer number (13543681021).

Almost surely, 2^121363747129 is an apocalyptic number.

121363747129 is the 348373-rd square number.

121363747129 is the 174187-th centered octagonal number.

It is an amenable number.

121363747129 is a deficient number, since it is larger than the sum of its proper divisors (529382060).

121363747129 is an frugal number, since it uses more digits than its factorization.

121363747129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3028 (or 1514 counting only the distinct ones).

The product of its digits is 381024, while the sum is 46.

The spelling of 121363747129 in words is "one hundred twenty-one billion, three hundred sixty-three million, seven hundred forty-seven thousand, one hundred twenty-nine".