21000211221101 has 8 divisors (see below), whose sum is σ = 25043730152064. Its totient is φ = 17217564479280.

The previous prime is 21000211221083. The next prime is 21000211221151. The reversal of 21000211221101 is 10112211200012.

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 21000211221101 - 2⁶ = 21000211221037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000211221151) 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, 65218047110 + ... + 65218047431.

It is an arithmetic number, because the mean of its divisors is an integer number (3130466269008).

Almost surely, 2^{21000211221101} is an apocalyptic number.

It is an amenable number.

21000211221101 is a deficient number, since it is larger than the sum of its proper divisors (4043518930963).

21000211221101 is a wasteful number, since it uses less digits than its factorization.

21000211221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130436094571.

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

Adding to 21000211221101 its reverse (10112211200012), we get a palindrome (31112422421113).

The spelling of 21000211221101 in words is "twenty-one trillion, two hundred eleven million, two hundred twenty-one thousand, one hundred one".