11238510171981 has 8 divisors (see below), whose sum is σ = 14988545264224. Its totient is φ = 7490407597200.

The previous prime is 11238510171971. The next prime is 11238510172003. The reversal of 11238510171981 is 18917101583211.

It is a happy number.

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

It is not a de Polignac number, because 11238510171981 - 2¹¹ = 11238510169933 is a prime.

It is a super-2 number, since 2×11238510171981² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11238510171981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11238510171971) 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, 483115795 + ... + 483139056.

It is an arithmetic number, because the mean of its divisors is an integer number (1873568158028).

Almost surely, 2^{11238510171981} is an apocalyptic number.

It is an amenable number.

11238510171981 is a deficient number, since it is larger than the sum of its proper divisors (3750035092243).

11238510171981 is an equidigital number, since it uses as much as digits as its factorization.

11238510171981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966258731.

The product of its (nonzero) digits is 120960, while the sum is 48.

The spelling of 11238510171981 in words is "eleven trillion, two hundred thirty-eight billion, five hundred ten million, one hundred seventy-one thousand, nine hundred eighty-one".