242403221421 has 6 divisors (see below), whose sum is σ = 350137986510. Its totient is φ = 161602147608.

The previous prime is 242403221419. The next prime is 242403221471. The reversal of 242403221421 is 124122304242.

It is a happy number.

242403221421 is a `hidden beast` number, since 2 + 42 + 403 + 2 + 214 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 211853075625 + 30550145796 = 460275^2 + 174786^2 .

It is not a de Polignac number, because 242403221421 - 2¹ = 242403221419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242403221471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13466845626 + ... + 13466845643.

It is an arithmetic number, because the mean of its divisors is an integer number (58356331085).

Almost surely, 2^242403221421 is an apocalyptic number.

It is an amenable number.

242403221421 is a deficient number, since it is larger than the sum of its proper divisors (107734765089).

242403221421 is a wasteful number, since it uses less digits than its factorization.

242403221421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26933691275 (or 26933691272 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 242403221421 its reverse (124122304242), we get a palindrome (366525525663).

The spelling of 242403221421 in words is "two hundred forty-two billion, four hundred three million, two hundred twenty-one thousand, four hundred twenty-one".