21121311130411 has 2 divisors, whose sum is σ = 21121311130412. Its totient is φ = 21121311130410.

The previous prime is 21121311130319. The next prime is 21121311130471. The reversal of 21121311130411 is 11403111312112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21121311130411 is a prime.

It is a super-2 number, since 2×21121311130411² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21121311130471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560655565205 + 10560655565206.

It is an arithmetic number, because the mean of its divisors is an integer number (10560655565206).

Almost surely, 2^{21121311130411} is an apocalyptic number.

21121311130411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121311130411 is an equidigital number, since it uses as much as digits as its factorization.

21121311130411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 21121311130411 its reverse (11403111312112), we get a palindrome (32524422442523).

The spelling of 21121311130411 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred eleven million, one hundred thirty thousand, four hundred eleven".