121355243004 has 12 divisors (see below), whose sum is σ = 283162233704. Its totient is φ = 40451747664.

The previous prime is 121355243003. The next prime is 121355243027. The reversal of 121355243004 is 400342553121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121355243003) 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, 5056468447 + ... + 5056468470.

Almost surely, 2^121355243004 is an apocalyptic number.

It is an amenable number.

121355243004 is an abundant number, since it is smaller than the sum of its proper divisors (161806990700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121355243004 is a wasteful number, since it uses less digits than its factorization.

121355243004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10112936924 (or 10112936922 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 121355243004 its reverse (400342553121), we get a palindrome (521697796125).

The spelling of 121355243004 in words is "one hundred twenty-one billion, three hundred fifty-five million, two hundred forty-three thousand, four".