21120012102211 has 4 divisors (see below), whose sum is σ = 23040013202424. Its totient is φ = 19200011002000.

The previous prime is 21120012102121. The next prime is 21120012102229. The reversal of 21120012102211 is 11220121002112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21120012102211 - 2⁷ = 21120012102083 is a prime.

It is a super-2 number, since 2×21120012102211² (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 (21120012192211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 960000550090 + ... + 960000550111.

It is an arithmetic number, because the mean of its divisors is an integer number (5760003300606).

Almost surely, 2^{21120012102211} is an apocalyptic number.

21120012102211 is a deficient number, since it is larger than the sum of its proper divisors (1920001100213).

21120012102211 is a wasteful number, since it uses less digits than its factorization.

21120012102211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920001100212.

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

Adding to 21120012102211 its reverse (11220121002112), we get a palindrome (32340133104323).

The spelling of 21120012102211 in words is "twenty-one trillion, one hundred twenty billion, twelve million, one hundred two thousand, two hundred eleven".