21214400523351 has 16 divisors (see below), whose sum is σ = 32326865451264. Its totient is φ = 12122454625344.

The previous prime is 21214400523301. The next prime is 21214400523353. The reversal of 21214400523351 is 15332500441212.

It is not a de Polignac number, because 21214400523351 - 2¹⁴ = 21214400506967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214400523353) 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, 2040276 + ... + 6825798.

It is an arithmetic number, because the mean of its divisors is an integer number (2020429090704).

Almost surely, 2^{21214400523351} is an apocalyptic number.

21214400523351 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21214400523351 is a deficient number, since it is larger than the sum of its proper divisors (11112464927913).

21214400523351 is a wasteful number, since it uses less digits than its factorization.

21214400523351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4996630.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 21214400523351 its reverse (15332500441212), we get a palindrome (36546900964563).

The spelling of 21214400523351 in words is "twenty-one trillion, two hundred fourteen billion, four hundred million, five hundred twenty-three thousand, three hundred fifty-one".