121560622091 has 4 divisors (see below), whose sum is σ = 121745085000. Its totient is φ = 121376159184.

The previous prime is 121560622087. The next prime is 121560622111. The reversal of 121560622091 is 190226065121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190226065121 = 100049 ⋅1901329.

It is a cyclic number.

It is not a de Polignac number, because 121560622091 - 2² = 121560622087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121560022091) 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, 92230466 + ... + 92231783.

It is an arithmetic number, because the mean of its divisors is an integer number (30436271250).

Almost surely, 2^121560622091 is an apocalyptic number.

121560622091 is a deficient number, since it is larger than the sum of its proper divisors (184462909).

121560622091 is an equidigital number, since it uses as much as digits as its factorization.

121560622091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184462908.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 121560622091 in words is "one hundred twenty-one billion, five hundred sixty million, six hundred twenty-two thousand, ninety-one".