121553414051 has 4 divisors (see below), whose sum is σ = 121631685672. Its totient is φ = 121475142432.

The previous prime is 121553413979. The next prime is 121553414077. The reversal of 121553414051 is 150414355121.

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

It is a cyclic number.

It is not a de Polignac number, because 121553414051 - 2²² = 121549219747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121553413999 and 121553414017.

It is not an unprimeable number, because it can be changed into a prime (121553414951) 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, 39133481 + ... + 39136586.

It is an arithmetic number, because the mean of its divisors is an integer number (30407921418).

Almost surely, 2^121553414051 is an apocalyptic number.

121553414051 is a deficient number, since it is larger than the sum of its proper divisors (78271621).

121553414051 is an equidigital number, since it uses as much as digits as its factorization.

121553414051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78271620.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 121553414051 its reverse (150414355121), we get a palindrome (271967769172).

The spelling of 121553414051 in words is "one hundred twenty-one billion, five hundred fifty-three million, four hundred fourteen thousand, fifty-one".