1220101200121 has 2 divisors, whose sum is σ = 1220101200122. Its totient is φ = 1220101200120.

The previous prime is 1220101200083. The next prime is 1220101200163. The reversal of 1220101200121 is 1210021010221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1218915362025 + 1185838096 = 1104045^2 + 34436^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220101200121 - 2³⁵ = 1185741461753 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220101200421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610050600060 + 610050600061.

It is an arithmetic number, because the mean of its divisors is an integer number (610050600061).

Almost surely, 2^{1220101200121} is an apocalyptic number.

It is an amenable number.

1220101200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220101200121 is an equidigital number, since it uses as much as digits as its factorization.

1220101200121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1220101200121 its reverse (1210021010221), we get a palindrome (2430122210342).

The spelling of 1220101200121 in words is "one trillion, two hundred twenty billion, one hundred one million, two hundred thousand, one hundred twenty-one".