1611220226601 has 8 divisors (see below), whose sum is σ = 2148299508960. Its totient is φ = 1074143880992.

The previous prime is 1611220226591. The next prime is 1611220226639. The reversal of 1611220226601 is 1066220221161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1611220226601 - 2¹¹ = 1611220224553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1611220226101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1680685 + ... + 2459093.

It is an arithmetic number, because the mean of its divisors is an integer number (268537438620).

Almost surely, 2^{1611220226601} is an apocalyptic number.

It is an amenable number.

1611220226601 is a deficient number, since it is larger than the sum of its proper divisors (537079282359).

1611220226601 is an equidigital number, since it uses as much as digits as its factorization.

1611220226601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468375.

The product of its (nonzero) digits is 3456, while the sum is 30.

Adding to 1611220226601 its reverse (1066220221161), we get a palindrome (2677440447762).

The spelling of 1611220226601 in words is "one trillion, six hundred eleven billion, two hundred twenty million, two hundred twenty-six thousand, six hundred one".