210420013521231 has 24 divisors (see below), whose sum is σ = 324319559431920. Its totient is φ = 131076345833856.

The previous prime is 210420013521149. The next prime is 210420013521283. The reversal of 210420013521231 is 132125310024012.

It is a happy number.

210420013521231 is a `hidden beast` number, since 2 + 1 + 0 + 420 + 0 + 1 + 3 + 5 + 2 + 1 + 231 = 666.

It is not a de Polignac number, because 210420013521231 - 2²⁵ = 210419979966799 is a prime.

It is a super-2 number, since 2×210420013521231² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210420013521195 and 210420013521204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210420013521031) 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, 8428250496 + ... + 8428275461.

It is an arithmetic number, because the mean of its divisors is an integer number (13513314976330).

Almost surely, 2^{210420013521231} is an apocalyptic number.

210420013521231 is a deficient number, since it is larger than the sum of its proper divisors (113899545910689).

210420013521231 is a wasteful number, since it uses less digits than its factorization.

210420013521231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16856526055 (or 16856526052 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 210420013521231 its reverse (132125310024012), we get a palindrome (342545323545243).

The spelling of 210420013521231 in words is "two hundred ten trillion, four hundred twenty billion, thirteen million, five hundred twenty-one thousand, two hundred thirty-one".