21000011120221 has 8 divisors (see below), whose sum is σ = 24000165444800. Its totient is φ = 17999894979648.

The previous prime is 21000011120213. The next prime is 21000011120357. The reversal of 21000011120221 is 12202111000012.

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 21000011120221 - 2³ = 21000011120213 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 (21000011120521) 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, 8357631 + ... + 10575916.

It is an arithmetic number, because the mean of its divisors is an integer number (3000020680600).

Almost surely, 2^{21000011120221} is an apocalyptic number.

It is an amenable number.

21000011120221 is a deficient number, since it is larger than the sum of its proper divisors (3000154324579).

21000011120221 is a wasteful number, since it uses less digits than its factorization.

21000011120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19092003.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21000011120221 its reverse (12202111000012), we get a palindrome (33202122120233).

The spelling of 21000011120221 in words is "twenty-one trillion, eleven million, one hundred twenty thousand, two hundred twenty-one".