21210100122011 has 8 divisors (see below), whose sum is σ = 21733697569248. Its totient is φ = 20686801624000.

The previous prime is 21210100121993. The next prime is 21210100122017. The reversal of 21210100122011 is 11022100101212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210100122011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210100122017) 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, 74593655 + ... + 74877456.

It is an arithmetic number, because the mean of its divisors is an integer number (2716712196156).

Almost surely, 2^{21210100122011} is an apocalyptic number.

21210100122011 is a deficient number, since it is larger than the sum of its proper divisors (523597447237).

21210100122011 is a wasteful number, since it uses less digits than its factorization.

21210100122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149474613.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21210100122011 its reverse (11022100101212), we get a palindrome (32232200223223).

The spelling of 21210100122011 in words is "twenty-one trillion, two hundred ten billion, one hundred million, one hundred twenty-two thousand, eleven".