20121120127 has 2 divisors, whose sum is σ = 20121120128. Its totient is φ = 20121120126.

The previous prime is 20121120079. The next prime is 20121120163. The reversal of 20121120127 is 72102112102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20121120127 - 2⁷ = 20121119999 is a prime.

It is a super-2 number, since 2×20121120127² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121120167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060560063 + 10060560064.

It is an arithmetic number, because the mean of its divisors is an integer number (10060560064).

Almost surely, 2^20121120127 is an apocalyptic number.

20121120127 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121120127 is an equidigital number, since it uses as much as digits as its factorization.

20121120127 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 19.

Adding to 20121120127 its reverse (72102112102), we get a palindrome (92223232229).

The spelling of 20121120127 in words is "twenty billion, one hundred twenty-one million, one hundred twenty thousand, one hundred twenty-seven".