21113203365351 has 12 divisors (see below), whose sum is σ = 31626362243112. Its totient is φ = 14075468910072.

The previous prime is 21113203365337. The next prime is 21113203365391. The reversal of 21113203365351 is 15356330231112.

21113203365351 is a `hidden beast` number, since 2 + 1 + 113 + 2 + 0 + 3 + 3 + 6 + 535 + 1 = 666.

It is not a de Polignac number, because 21113203365351 - 2¹⁰ = 21113203364327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113203365391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43442805036 + ... + 43442805521.

It is an arithmetic number, because the mean of its divisors is an integer number (2635530186926).

Almost surely, 2^{21113203365351} is an apocalyptic number.

21113203365351 is a deficient number, since it is larger than the sum of its proper divisors (10513158877761).

21113203365351 is an frugal number, since it uses more digits than its factorization.

21113203365351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86885610572 (or 86885610560 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

Adding to 21113203365351 its reverse (15356330231112), we get a palindrome (36469533596463).

The spelling of 21113203365351 in words is "twenty-one trillion, one hundred thirteen billion, two hundred three million, three hundred sixty-five thousand, three hundred fifty-one".