121220302424 has 48 divisors (see below), whose sum is σ = 249488328600. Its totient is φ = 55181378304.

The previous prime is 121220302421. The next prime is 121220302481. The reversal of 121220302424 is 424203022121.

It is a self number, because there is not a number n which added to its sum of digits gives 121220302424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220302421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 515414 + ... + 712805.

Almost surely, 2^121220302424 is an apocalyptic number.

It is an amenable number.

121220302424 is an abundant number, since it is smaller than the sum of its proper divisors (128268026176).

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

121220302424 is a wasteful number, since it uses less digits than its factorization.

121220302424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228324 (or 1228307 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 121220302424 its reverse (424203022121), we get a palindrome (545423324545).

The spelling of 121220302424 in words is "one hundred twenty-one billion, two hundred twenty million, three hundred two thousand, four hundred twenty-four".