121221033224420 has 12 divisors (see below), whose sum is σ = 254564169771324. Its totient is φ = 48488413289760.

The previous prime is 121221033224419. The next prime is 121221033224461. The reversal of 121221033224420 is 24422330122121.

It can be written as a sum of positive squares in 2 ways, for example, as 57935571617764 + 63285461606656 = 7611542^2 + 7955216^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030525830591 + ... + 3030525830630.

It is an arithmetic number, because the mean of its divisors is an integer number (21213680814277).

Almost surely, 2^{121221033224420} is an apocalyptic number.

121221033224420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121221033224420 is an abundant number, since it is smaller than the sum of its proper divisors (133343136546904).

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

121221033224420 is a wasteful number, since it uses less digits than its factorization.

121221033224420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6061051661230 (or 6061051661228 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 121221033224420 its reverse (24422330122121), we get a palindrome (145643363346541).

The spelling of 121221033224420 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, thirty-three million, two hundred twenty-four thousand, four hundred twenty".