21000202002011 has 4 divisors (see below), whose sum is σ = 21913254262992. Its totient is φ = 20087149741032.

The previous prime is 21000202001939. The next prime is 21000202002083. The reversal of 21000202002011 is 11020020200012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21000202001939) and next prime (21000202002083).

It is a cyclic number.

It is not a de Polignac number, because 21000202002011 - 2²² = 21000197807707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000202001983 and 21000202002001.

It is not an unprimeable number, because it can be changed into a prime (21000202002511) 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, 456526130456 + ... + 456526130501.

It is an arithmetic number, because the mean of its divisors is an integer number (5478313565748).

Almost surely, 2^{21000202002011} is an apocalyptic number.

21000202002011 is a deficient number, since it is larger than the sum of its proper divisors (913052260981).

21000202002011 is an equidigital number, since it uses as much as digits as its factorization.

21000202002011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913052260980.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21000202002011 its reverse (11020020200012), we get a palindrome (32020222202023).

The spelling of 21000202002011 in words is "twenty-one trillion, two hundred two million, two thousand, eleven".