21202100011 has 8 divisors (see below), whose sum is σ = 21532916240. Its totient is φ = 20873762208.

The previous prime is 21202099987. The next prime is 21202100033. The reversal of 21202100011 is 11000120212.

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 21202100011 - 2⁷ = 21202099883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202200011) 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, 602361 + ... + 636586.

It is an arithmetic number, because the mean of its divisors is an integer number (2691614530).

Almost surely, 2^21202100011 is an apocalyptic number.

21202100011 is a deficient number, since it is larger than the sum of its proper divisors (330816229).

21202100011 is a wasteful number, since it uses less digits than its factorization.

21202100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239213.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21202100011 its reverse (11000120212), we get a palindrome (32202220223).

The spelling of 21202100011 in words is "twenty-one billion, two hundred two million, one hundred thousand, eleven".