21035336203161 has 80 divisors (see below), whose sum is σ = 38648016190080. Its totient is φ = 11127660664320.

The previous prime is 21035336203019. The next prime is 21035336203207. The reversal of 21035336203161 is 16130263353012.

21035336203161 is a `hidden beast` number, since 2 + 1 + 0 + 3 + 5 + 336 + 2 + 0 + 316 + 1 = 666.

It is not a de Polignac number, because 21035336203161 - 2²⁶ = 21035269094297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21035336201161) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 17299851 + ... + 18475808.

It is an arithmetic number, because the mean of its divisors is an integer number (483100202376).

Almost surely, 2^{21035336203161} is an apocalyptic number.

21035336203161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21035336203161 is a deficient number, since it is larger than the sum of its proper divisors (17612679986919).

21035336203161 is a wasteful number, since it uses less digits than its factorization.

21035336203161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35775756 (or 35775747 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

Adding to 21035336203161 its reverse (16130263353012), we get a palindrome (37165599556173).

The spelling of 21035336203161 in words is "twenty-one trillion, thirty-five billion, three hundred thirty-six million, two hundred three thousand, one hundred sixty-one".