21120121002211 has 16 divisors (see below), whose sum is σ = 27239564931840. Its totient is φ = 15889746206880.

The previous prime is 21120121002209. The next prime is 21120121002287. The reversal of 21120121002211 is 11220012102112.

It is not a de Polignac number, because 21120121002211 - 2¹ = 21120121002209 is a prime.

It is a super-2 number, since 2×21120121002211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120121002611) 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, 4729088901 + ... + 4729093366.

It is an arithmetic number, because the mean of its divisors is an integer number (1702472808240).

Almost surely, 2^{21120121002211} is an apocalyptic number.

21120121002211 is a deficient number, since it is larger than the sum of its proper divisors (6119443929629).

21120121002211 is a wasteful number, since it uses less digits than its factorization.

21120121002211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9458182314.

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

Adding to 21120121002211 its reverse (11220012102112), we get a palindrome (32340133104323).

The spelling of 21120121002211 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty-one million, two thousand, two hundred eleven".