1221882653 has 2 divisors, whose sum is σ = 1221882654. Its totient is φ = 1221882652.

The previous prime is 1221882637. The next prime is 1221882671. The reversal of 1221882653 is 3562881221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1095477604 + 126405049 = 33098^2 + 11243^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221882653 - 2⁴ = 1221882637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221881653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610941326 + 610941327.

It is an arithmetic number, because the mean of its divisors is an integer number (610941327).

Almost surely, 2^1221882653 is an apocalyptic number.

It is an amenable number.

1221882653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221882653 is an equidigital number, since it uses as much as digits as its factorization.

1221882653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 38.

The square root of 1221882653 is about 34955.4381033910. The cubic root of 1221882653 is about 1069.0790844693.

The spelling of 1221882653 in words is "one billion, two hundred twenty-one million, eight hundred eighty-two thousand, six hundred fifty-three".