221020000127 has 2 divisors, whose sum is σ = 221020000128. Its totient is φ = 221020000126.

The previous prime is 221020000099. The next prime is 221020000139. The reversal of 221020000127 is 721000020122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221020000127 - 2³⁴ = 203840130943 is a prime.

It is a super-2 number, since 2×221020000127² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221020000027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510000063 + 110510000064.

It is an arithmetic number, because the mean of its divisors is an integer number (110510000064).

Almost surely, 2^221020000127 is an apocalyptic number.

221020000127 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020000127 is an equidigital number, since it uses as much as digits as its factorization.

221020000127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 17.

Adding to 221020000127 its reverse (721000020122), we get a palindrome (942020020249).

The spelling of 221020000127 in words is "two hundred twenty-one billion, twenty million, one hundred twenty-seven", and thus it is an aban number.