242100223421 has 16 divisors (see below), whose sum is σ = 293008389120. Its totient is φ = 195276560640.

The previous prime is 242100223369. The next prime is 242100223423. The reversal of 242100223421 is 124322001242.

It is a de Polignac number, because none of the positive numbers 2^k-242100223421 is a prime.

It is a super-2 number, since 2×242100223421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242100223423) 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, 601076 + ... + 919506.

It is an arithmetic number, because the mean of its divisors is an integer number (18313024320).

Almost surely, 2^242100223421 is an apocalyptic number.

It is an amenable number.

242100223421 is a deficient number, since it is larger than the sum of its proper divisors (50908165699).

242100223421 is a wasteful number, since it uses less digits than its factorization.

242100223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324844.

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

Adding to 242100223421 its reverse (124322001242), we get a palindrome (366422224663).

The spelling of 242100223421 in words is "two hundred forty-two billion, one hundred million, two hundred twenty-three thousand, four hundred twenty-one".