1201220653 has 2 divisors, whose sum is σ = 1201220654. Its totient is φ = 1201220652.

The previous prime is 1201220639. The next prime is 1201220693. The reversal of 1201220653 is 3560221021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1184598724 + 16621929 = 34418^2 + 4077^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201220653 - 2²⁵ = 1167666221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201220633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600610326 + 600610327.

It is an arithmetic number, because the mean of its divisors is an integer number (600610327).

Almost surely, 2^1201220653 is an apocalyptic number.

It is an amenable number.

1201220653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201220653 is an equidigital number, since it uses as much as digits as its factorization.

1201220653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1201220653 is about 34658.6302816485. The cubic root of 1201220653 is about 1063.0187630154.

Adding to 1201220653 its reverse (3560221021), we get a palindrome (4761441674).

The spelling of 1201220653 in words is "one billion, two hundred one million, two hundred twenty thousand, six hundred fifty-three".