121560177049 has 4 divisors (see below), whose sum is σ = 121649495220. Its totient is φ = 121470858880.

The previous prime is 121560177017. The next prime is 121560177097. The reversal of 121560177049 is 940771065121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50161665024 + 71398512025 = 223968^2 + 267205^2 .

It is a cyclic number.

It is not a de Polignac number, because 121560177049 - 2⁵ = 121560177017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121560176996 and 121560177014.

It is not an unprimeable number, because it can be changed into a prime (121560177449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44657044 + ... + 44659765.

It is an arithmetic number, because the mean of its divisors is an integer number (30412373805).

Almost surely, 2^121560177049 is an apocalyptic number.

It is an amenable number.

121560177049 is a deficient number, since it is larger than the sum of its proper divisors (89318171).

121560177049 is an equidigital number, since it uses as much as digits as its factorization.

121560177049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89318170.

The product of its (nonzero) digits is 105840, while the sum is 43.

The spelling of 121560177049 in words is "one hundred twenty-one billion, five hundred sixty million, one hundred seventy-seven thousand, forty-nine".