11621600405221 has 4 divisors (see below), whose sum is σ = 11621626455744. Its totient is φ = 11621574354700.

The previous prime is 11621600405201. The next prime is 11621600405227. The reversal of 11621600405221 is 12250400612611.

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 not a de Polignac number, because 11621600405221 - 2⁵ = 11621600405189 is a prime.

It is a super-2 number, since 2×11621600405221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11621600405227) 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, 12344215 + ... + 13252276.

It is an arithmetic number, because the mean of its divisors is an integer number (2905406613936).

Almost surely, 2^{11621600405221} is an apocalyptic number.

It is an amenable number.

11621600405221 is a deficient number, since it is larger than the sum of its proper divisors (26050523).

11621600405221 is an equidigital number, since it uses as much as digits as its factorization.

11621600405221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26050522.

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 11621600405221 in words is "eleven trillion, six hundred twenty-one billion, six hundred million, four hundred five thousand, two hundred twenty-one".