21121110205627 has 2 divisors, whose sum is σ = 21121110205628. Its totient is φ = 21121110205626.

The previous prime is 21121110205621. The next prime is 21121110205631. The reversal of 21121110205627 is 72650201112112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21121110205627 is a prime.

It is a super-2 number, since 2×21121110205627² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21121110205621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560555102813 + 10560555102814.

It is an arithmetic number, because the mean of its divisors is an integer number (10560555102814).

Almost surely, 2^{21121110205627} is an apocalyptic number.

21121110205627 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121110205627 is an equidigital number, since it uses as much as digits as its factorization.

21121110205627 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 31.

Adding to 21121110205627 its reverse (72650201112112), we get a palindrome (93771311317739).

The spelling of 21121110205627 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, two hundred five thousand, six hundred twenty-seven".