11601620421 has 8 divisors (see below), whose sum is σ = 15472847040. Its totient is φ = 7732403712.

The previous prime is 11601620399. The next prime is 11601620423. The reversal of 11601620421 is 12402610611.

It is a happy number.

11601620421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11601620421 - 2¹⁸ = 11601358277 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11601620391 and 11601620400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11601620423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488956 + ... + 512133.

It is an arithmetic number, because the mean of its divisors is an integer number (1934105880).

Almost surely, 2^11601620421 is an apocalyptic number.

It is an amenable number.

11601620421 is a deficient number, since it is larger than the sum of its proper divisors (3871226619).

11601620421 is a wasteful number, since it uses less digits than its factorization.

11601620421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004955.

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 11601620421 in words is "eleven billion, six hundred one million, six hundred twenty thousand, four hundred twenty-one".