121736094649 has 9 divisors (see below), whose sum is σ = 131825653263. Its totient is φ = 112367592792.

The previous prime is 121736094647. The next prime is 121736094653. The reversal of 121736094649 is 946490637121.

The square root of 121736094649 is 348907.

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

It can be written as a sum of positive squares in only one way, i.e., 18008298025 + 103727796624 = 134195^2 + 322068^2 .

It is not a de Polignac number, because 121736094649 - 2¹ = 121736094647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121736094596 and 121736094605.

It is not an unprimeable number, because it can be changed into a prime (121736094647) 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 8 ways as a sum of consecutive naturals, for example, 4522372 + ... + 4549210.

It is an arithmetic number, because the mean of its divisors is an integer number (14647294807).

Almost surely, 2^121736094649 is an apocalyptic number.

121736094649 is the 348907-th square number.

121736094649 is the 174454-th centered octagonal number.

It is an amenable number.

121736094649 is a deficient number, since it is larger than the sum of its proper divisors (10089558614).

121736094649 is an frugal number, since it uses more digits than its factorization.

121736094649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53704 (or 26852 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 121736094649 in words is "one hundred twenty-one billion, seven hundred thirty-six million, ninety-four thousand, six hundred forty-nine".