121222431240424 has 16 divisors (see below), whose sum is σ = 227493380168100. Its totient is φ = 60557529862272.

The previous prime is 121222431240413. The next prime is 121222431240511. The reversal of 121222431240424 is 424042134222121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 117107416137924 + 4115015102500 = 10821618^2 + 2028550^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121222431240424.

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, 6710710147 + ... + 6710728210.

Almost surely, 2^{121222431240424} is an apocalyptic number.

It is an amenable number.

121222431240424 is a deficient number, since it is larger than the sum of its proper divisors (106270948927676).

121222431240424 is a wasteful number, since it uses less digits than its factorization.

121222431240424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13421439492 (or 13421439488 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 34.

Adding to 121222431240424 its reverse (424042134222121), we get a palindrome (545264565462545).

The spelling of 121222431240424 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, four hundred thirty-one million, two hundred forty thousand, four hundred twenty-four".