21221001100211 has 8 divisors (see below), whose sum is σ = 23150216667648. Its totient is φ = 19291791141000.

The previous prime is 21221001100151. The next prime is 21221001100213. The reversal of 21221001100211 is 11200110012212.

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 21221001100211 - 2⁶ = 21221001100147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221001100213) 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, 12522506 + ... + 14115776.

It is an arithmetic number, because the mean of its divisors is an integer number (2893777083456).

Almost surely, 2^{21221001100211} is an apocalyptic number.

21221001100211 is a deficient number, since it is larger than the sum of its proper divisors (1929215567437).

21221001100211 is a wasteful number, since it uses less digits than its factorization.

21221001100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804113.

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

Adding to 21221001100211 its reverse (11200110012212), we get a palindrome (32421111112423).

The spelling of 21221001100211 in words is "twenty-one trillion, two hundred twenty-one billion, one million, one hundred thousand, two hundred eleven".