21121022001211 has 8 divisors (see below), whose sum is σ = 23043357914544. Its totient is φ = 19199059921920.

The previous prime is 21121022001161. The next prime is 21121022001217. The reversal of 21121022001211 is 11210022012112.

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 21121022001211 - 2¹⁵ = 21121021968443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21121022001217) 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, 93340366 + ... + 93566371.

It is an arithmetic number, because the mean of its divisors is an integer number (2880419739318).

Almost surely, 2^{21121022001211} is an apocalyptic number.

21121022001211 is a deficient number, since it is larger than the sum of its proper divisors (1922335913333).

21121022001211 is a wasteful number, since it uses less digits than its factorization.

21121022001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186917021.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21121022001211 its reverse (11210022012112), we get a palindrome (32331044013323).

The spelling of 21121022001211 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-two million, one thousand, two hundred eleven".