21211200101 has 16 divisors (see below), whose sum is σ = 27641746944. Its totient is φ = 15795281664.

The previous prime is 21211200061. The next prime is 21211200121. The reversal of 21211200101 is 10100211212.

It is a cyclic number.

It is not a de Polignac number, because 21211200101 - 2¹⁰ = 21211199077 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211200121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6854045 + ... + 6857138.

It is an arithmetic number, because the mean of its divisors is an integer number (1727609184).

Almost surely, 2^21211200101 is an apocalyptic number.

It is an amenable number.

21211200101 is a deficient number, since it is larger than the sum of its proper divisors (6430546843).

21211200101 is a wasteful number, since it uses less digits than its factorization.

21211200101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13711220.

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

Adding to 21211200101 its reverse (10100211212), we get a palindrome (31311411313).

The spelling of 21211200101 in words is "twenty-one billion, two hundred eleven million, two hundred thousand, one hundred one".