121221022127 has 2 divisors, whose sum is σ = 121221022128. Its totient is φ = 121221022126.

The previous prime is 121221022049. The next prime is 121221022147. The reversal of 121221022127 is 721220122121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121221022127 - 2⁸ = 121221021871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221022147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610511063 + 60610511064.

It is an arithmetic number, because the mean of its divisors is an integer number (60610511064).

Almost surely, 2^121221022127 is an apocalyptic number.

121221022127 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221022127 is an equidigital number, since it uses as much as digits as its factorization.

121221022127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 121221022127 its reverse (721220122121), we get a palindrome (842441144248).

The spelling of 121221022127 in words is "one hundred twenty-one billion, two hundred twenty-one million, twenty-two thousand, one hundred twenty-seven".