221211021100127 has 2 divisors, whose sum is σ = 221211021100128. Its totient is φ = 221211021100126.

The previous prime is 221211021100117. The next prime is 221211021100211. The reversal of 221211021100127 is 721001120112122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221211021100127 - 2⁶ = 221211021100063 is a prime.

It is a super-2 number, since 2×221211021100127² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221211021100117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605510550063 + 110605510550064.

It is an arithmetic number, because the mean of its divisors is an integer number (110605510550064).

Almost surely, 2^{221211021100127} is an apocalyptic number.

221211021100127 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211021100127 is an equidigital number, since it uses as much as digits as its factorization.

221211021100127 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 23.

Adding to 221211021100127 its reverse (721001120112122), we get a palindrome (942212141212249).

The spelling of 221211021100127 in words is "two hundred twenty-one trillion, two hundred eleven billion, twenty-one million, one hundred thousand, one hundred twenty-seven".