210042240241421 has 16 divisors (see below), whose sum is σ = 243444890695680. Its totient is φ = 177489069957360.

The previous prime is 210042240241409. The next prime is 210042240241429. The reversal of 210042240241421 is 124142042240012.

It is not a de Polignac number, because 210042240241421 - 2⁴⁶ = 139673496063757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210042240241429) 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, 5848391 + ... + 21314036.

It is an arithmetic number, because the mean of its divisors is an integer number (15215305668480).

Almost surely, 2^{210042240241421} is an apocalyptic number.

It is an amenable number.

210042240241421 is a deficient number, since it is larger than the sum of its proper divisors (33402650454259).

210042240241421 is a wasteful number, since it uses less digits than its factorization.

210042240241421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27178064.

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 210042240241421 its reverse (124142042240012), we get a palindrome (334184282481433).

The spelling of 210042240241421 in words is "two hundred ten trillion, forty-two billion, two hundred forty million, two hundred forty-one thousand, four hundred twenty-one".