21000101220011 has 8 divisors (see below), whose sum is σ = 21488681755200. Its totient is φ = 20511530052552.

The previous prime is 21000101219899. The next prime is 21000101220023. The reversal of 21000101220011 is 11002210100012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21000101220011 - 2²² = 21000097025707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000101219974 and 21000101220001.

It is not an unprimeable number, because it can be changed into a prime (21000101220911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2299496 + ... + 6876618.

It is an arithmetic number, because the mean of its divisors is an integer number (2686085219400).

Almost surely, 2^{21000101220011} is an apocalyptic number.

21000101220011 is a deficient number, since it is larger than the sum of its proper divisors (488580535189).

21000101220011 is a wasteful number, since it uses less digits than its factorization.

21000101220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4683865.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21000101220011 its reverse (11002210100012), we get a palindrome (32002311320023).

The spelling of 21000101220011 in words is "twenty-one trillion, one hundred one million, two hundred twenty thousand, eleven".