21121221422411 has 32 divisors (see below), whose sum is σ = 23657231727360. Its totient is φ = 18696122265600.

The previous prime is 21121221422359. The next prime is 21121221422417. The reversal of 21121221422411 is 11422412212112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21121221422411 is a prime.

It is a super-2 number, since 2×21121221422411² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121221422417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19782080 + ... + 20822418.

It is an arithmetic number, because the mean of its divisors is an integer number (739288491480).

Almost surely, 2^{21121221422411} is an apocalyptic number.

21121221422411 is a deficient number, since it is larger than the sum of its proper divisors (2536010304949).

21121221422411 is a wasteful number, since it uses less digits than its factorization.

21121221422411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040747.

The product of its digits is 1024, while the sum is 26.

Adding to 21121221422411 its reverse (11422412212112), we get a palindrome (32543633634523).

The spelling of 21121221422411 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty-one million, four hundred twenty-two thousand, four hundred eleven".