1221153151419 has 16 divisors (see below), whose sum is σ = 1839778761600. Its totient is φ = 800303759208.

The previous prime is 1221153151397. The next prime is 1221153151429. The reversal of 1221153151419 is 9141513511221.

1221153151419 is a `hidden beast` number, since 1 + 22 + 11 + 531 + 51 + 41 + 9 = 666.

It is not a de Polignac number, because 1221153151419 - 2¹³ = 1221153143227 is a prime.

It is a super-2 number, since 2×1221153151419² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221153151429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383285649 + ... + 383288834.

It is an arithmetic number, because the mean of its divisors is an integer number (114986172600).

Almost surely, 2^{1221153151419} is an apocalyptic number.

1221153151419 is a deficient number, since it is larger than the sum of its proper divisors (618625610181).

1221153151419 is an equidigital number, since it uses as much as digits as its factorization.

1221153151419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766574551 (or 766574545 counting only the distinct ones).

The product of its digits is 10800, while the sum is 36.

The spelling of 1221153151419 in words is "one trillion, two hundred twenty-one billion, one hundred fifty-three million, one hundred fifty-one thousand, four hundred nineteen".