11642220231 has 8 divisors (see below), whose sum is σ = 15901569264. Its totient is φ = 7572175680.

The previous prime is 11642220223. The next prime is 11642220241. The reversal of 11642220231 is 13202224611.

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

It is not a de Polignac number, because 11642220231 - 2³ = 11642220223 is a prime.

It is a super-2 number, since 2×11642220231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11642220241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47325976 + ... + 47326221.

It is an arithmetic number, because the mean of its divisors is an integer number (1987696158).

Almost surely, 2^11642220231 is an apocalyptic number.

11642220231 is a deficient number, since it is larger than the sum of its proper divisors (4259349033).

11642220231 is an equidigital number, since it uses as much as digits as its factorization.

11642220231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94652241.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 11642220231 its reverse (13202224611), we get a palindrome (24844444842).

The spelling of 11642220231 in words is "eleven billion, six hundred forty-two million, two hundred twenty thousand, two hundred thirty-one".