1201201121 has 2 divisors, whose sum is σ = 1201201122. Its totient is φ = 1201201120.

The previous prime is 1201201093. The next prime is 1201201129. The reversal of 1201201121 is 1211021021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 866713600 + 334487521 = 29440^2 + 18289^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201201121 - 2²² = 1197006817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201201129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600600560 + 600600561.

It is an arithmetic number, because the mean of its divisors is an integer number (600600561).

Almost surely, 2^1201201121 is an apocalyptic number.

It is an amenable number.

1201201121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201201121 is an equidigital number, since it uses as much as digits as its factorization.

1201201121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1201201121 is about 34658.3485036434. The cubic root of 1201201121 is about 1063.0130013776.

Adding to 1201201121 its reverse (1211021021), we get a palindrome (2412222142).

The spelling of 1201201121 in words is "one billion, two hundred one million, two hundred one thousand, one hundred twenty-one".