210302345421 has 24 divisors (see below), whose sum is σ = 347186623680. Its totient is φ = 120165552576.

The previous prime is 210302345387. The next prime is 210302345441. The reversal of 210302345421 is 124543203012.

210302345421 is a `hidden beast` number, since 2 + 1 + 0 + 3 + 0 + 234 + 5 + 421 = 666.

It is not a de Polignac number, because 210302345421 - 2⁹ = 210302344909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210302345441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1063666 + ... + 1245788.

It is an arithmetic number, because the mean of its divisors is an integer number (14466109320).

Almost surely, 2^210302345421 is an apocalyptic number.

210302345421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210302345421 is a deficient number, since it is larger than the sum of its proper divisors (136884278259).

210302345421 is a wasteful number, since it uses less digits than its factorization.

210302345421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200465 (or 200462 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 210302345421 its reverse (124543203012), we get a palindrome (334845548433).

The spelling of 210302345421 in words is "two hundred ten billion, three hundred two million, three hundred forty-five thousand, four hundred twenty-one".