1201000121 has 2 divisors, whose sum is σ = 1201000122. Its totient is φ = 1201000120.

The previous prime is 1201000103. The next prime is 1201000133. The reversal of 1201000121 is 1210001021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1191630400 + 9369721 = 34520^2 + 3061^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201000121 - 2²⁶ = 1133891257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201000099 and 1201000108.

It is not a weakly prime, because it can be changed into another prime (1201000181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600500060 + 600500061.

It is an arithmetic number, because the mean of its divisors is an integer number (600500061).

Almost surely, 2^1201000121 is an apocalyptic number.

It is an amenable number.

1201000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201000121 is an equidigital number, since it uses as much as digits as its factorization.

1201000121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1201000121 is about 34655.4486480842. The cubic root of 1201000121 is about 1062.9537058585.

Adding to 1201000121 its reverse (1210001021), we get a palindrome (2411001142).

The spelling of 1201000121 in words is "one billion, two hundred one million, one hundred twenty-one", and thus it is an aban number.