21122112100027 has 2 divisors, whose sum is σ = 21122112100028. Its totient is φ = 21122112100026.

The previous prime is 21122112099997. The next prime is 21122112100079. The reversal of 21122112100027 is 72000121122112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21122112100027 - 2¹⁹ = 21122111575739 is a prime.

It is a super-2 number, since 2×21122112100027² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122112099980 and 21122112100007.

It is not a weakly prime, because it can be changed into another prime (21122112100087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561056050013 + 10561056050014.

It is an arithmetic number, because the mean of its divisors is an integer number (10561056050014).

Almost surely, 2^{21122112100027} is an apocalyptic number.

21122112100027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122112100027 is an equidigital number, since it uses as much as digits as its factorization.

21122112100027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 21122112100027 its reverse (72000121122112), we get a palindrome (93122233222139).

The spelling of 21122112100027 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twelve million, one hundred thousand, twenty-seven".