121211320424424 has 128 divisors (see below), whose sum is σ = 309476823552000. Its totient is φ = 39549989240064.

The previous prime is 121211320424423. The next prime is 121211320424479. The reversal of 121211320424424 is 424424023112121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121211320424423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 611390577 + ... + 611588799.

It is an arithmetic number, because the mean of its divisors is an integer number (2417787684000).

Almost surely, 2^{121211320424424} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121211320424424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154738411776000).

121211320424424 is an abundant number, since it is smaller than the sum of its proper divisors (188265503127576).

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

121211320424424 is a wasteful number, since it uses less digits than its factorization.

121211320424424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200127 (or 200123 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

Adding to 121211320424424 its reverse (424424023112121), we get a palindrome (545635343536545).

The spelling of 121211320424424 in words is "one hundred twenty-one trillion, two hundred eleven billion, three hundred twenty million, four hundred twenty-four thousand, four hundred twenty-four".