210142401122421 has 40 divisors (see below), whose sum is σ = 315938786231904. Its totient is φ = 139192522653600.

The previous prime is 210142401122419. The next prime is 210142401122447. The reversal of 210142401122421 is 124221104241012.

210142401122421 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 4 + 2 + 401 + 12 + 242 + 1 = 666.

It is not a de Polignac number, because 210142401122421 - 2¹ = 210142401122419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210142401122471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 176975746 + ... + 178159196.

Almost surely, 2^{210142401122421} is an apocalyptic number.

It is an amenable number.

210142401122421 is a deficient number, since it is larger than the sum of its proper divisors (105796385109483).

210142401122421 is a wasteful number, since it uses less digits than its factorization.

210142401122421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197583 (or 1197574 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

Adding to 210142401122421 its reverse (124221104241012), we get a palindrome (334363505363433).

The spelling of 210142401122421 in words is "two hundred ten trillion, one hundred forty-two billion, four hundred one million, one hundred twenty-two thousand, four hundred twenty-one".