11621404225231 has 4 divisors (see below), whose sum is σ = 11692701183832. Its totient is φ = 11550107266632.

The previous prime is 11621404225121. The next prime is 11621404225237. The reversal of 11621404225231 is 13252240412611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11621404225231 is a prime.

It is a super-2 number, since 2×11621404225231² (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 (11621404225237) 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, 35648479056 + ... + 35648479381.

It is an arithmetic number, because the mean of its divisors is an integer number (2923175295958).

Almost surely, 2^{11621404225231} is an apocalyptic number.

11621404225231 is a deficient number, since it is larger than the sum of its proper divisors (71296958601).

11621404225231 is an equidigital number, since it uses as much as digits as its factorization.

11621404225231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71296958600.

The product of its (nonzero) digits is 23040, while the sum is 34.

Adding to 11621404225231 its reverse (13252240412611), we get a palindrome (24873644637842).

The spelling of 11621404225231 in words is "eleven trillion, six hundred twenty-one billion, four hundred four million, two hundred twenty-five thousand, two hundred thirty-one".