11946233081621 has 4 divisors (see below), whose sum is σ = 12574982191200. Its totient is φ = 11317483972044.

The previous prime is 11946233081599. The next prime is 11946233081623. The reversal of 11946233081621 is 12618033264911.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11946233081621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11946233081623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314374554761 + ... + 314374554798.

It is an arithmetic number, because the mean of its divisors is an integer number (3143745547800).

Almost surely, 2^{11946233081621} is an apocalyptic number.

It is an amenable number.

11946233081621 is a deficient number, since it is larger than the sum of its proper divisors (628749109579).

11946233081621 is an equidigital number, since it uses as much as digits as its factorization.

11946233081621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628749109578.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 11946233081621 in words is "eleven trillion, nine hundred forty-six billion, two hundred thirty-three million, eighty-one thousand, six hundred twenty-one".