21335990100641 has 4 divisors (see below), whose sum is σ = 21336052794672. Its totient is φ = 21335927406612.

The previous prime is 21335990100629. The next prime is 21335990100697. The reversal of 21335990100641 is 14600109953312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21335990100641 - 2¹⁴ = 21335990084257 is a prime.

It is a super-2 number, since 2×21335990100641² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21335990100592 and 21335990100601.

It is not an unprimeable number, because it can be changed into a prime (21335590100641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30833735 + ... + 31518108.

It is an arithmetic number, because the mean of its divisors is an integer number (5334013198668).

Almost surely, 2^{21335990100641} is an apocalyptic number.

It is an amenable number.

21335990100641 is a deficient number, since it is larger than the sum of its proper divisors (62694031).

21335990100641 is an equidigital number, since it uses as much as digits as its factorization.

21335990100641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62694030.

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 21335990100641 in words is "twenty-one trillion, three hundred thirty-five billion, nine hundred ninety million, one hundred thousand, six hundred forty-one".