1201213289 has 2 divisors, whose sum is σ = 1201213290. Its totient is φ = 1201213288.

The previous prime is 1201213243. The next prime is 1201213297. The reversal of 1201213289 is 9823121021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1199929600 + 1283689 = 34640^2 + 1133^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201213289 - 2⁸ = 1201213033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201213229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600606644 + 600606645.

It is an arithmetic number, because the mean of its divisors is an integer number (600606645).

Almost surely, 2^1201213289 is an apocalyptic number.

It is an amenable number.

1201213289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201213289 is an equidigital number, since it uses as much as digits as its factorization.

1201213289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1201213289 is about 34658.5240453196. The cubic root of 1201213289 is about 1063.0165907567.

The spelling of 1201213289 in words is "one billion, two hundred one million, two hundred thirteen thousand, two hundred eighty-nine".