121045440051 has 24 divisors (see below), whose sum is σ = 185179990320.
Its totient is φ = 75928882176.
The previous prime is 121045440013. The next prime is 121045440059. The reversal of 121045440051 is 150044540121.
Adding to 121045440051 its reverse (150044540121), we get a palindrome (271089980172).
121045440051 is a `hidden beast` number, since 1 + 210 + 4 + 5 + 440 + 0 + 5 + 1 = 666.
It is not a de Polignac number, because 121045440051 - 29 = 121045439539 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 121045439997 and 121045440024.
It is not an unprimeable number, because it can be changed into a prime (121045440059) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 448795 + ... + 665963.
It is an arithmetic number, because the mean of its divisors is an integer number (7715832930).
Almost surely, 2121045440051 is an apocalyptic number.
121045440051 is a deficient number, since it is larger than the sum of its proper divisors (64134550269).
121045440051 is a wasteful number, since it uses less digits than its factorization.
121045440051 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 220835 (or 220832 counting only the distinct ones).
The product of its (nonzero) digits is 3200, while the sum is 27.
The spelling of 121045440051 in words is "one hundred twenty-one billion, forty-five million, four hundred forty thousand, fifty-one".