121221021221124 has 48 divisors (see below), whose sum is σ = 313621002762816. Its totient is φ = 36131451926400.

The previous prime is 121221021221123. The next prime is 121221021221141. The reversal of 121221021221124 is 421122120122121.

It is a junction number, because it is equal to n+sod(n) for n = 121221021221094 and 121221021221103.

It is not an unprimeable number, because it can be changed into a prime (121221021221123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7527377767 + ... + 7527393870.

It is an arithmetic number, because the mean of its divisors is an integer number (6533770890892).

Almost surely, 2^{121221021221124} is an apocalyptic number.

It is an amenable number.

121221021221124 is an abundant number, since it is smaller than the sum of its proper divisors (192399981541692).

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

121221021221124 is a wasteful number, since it uses less digits than its factorization.

121221021221124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15054771716 (or 15054771714 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

Adding to 121221021221124 its reverse (421122120122121), we get a palindrome (542343141343245).

The spelling of 121221021221124 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, two hundred twenty-one thousand, one hundred twenty-four".