11231221012758 has 24 divisors (see below), whose sum is σ = 25765742324088. Its totient is φ = 3523520317632.

The previous prime is 11231221012757. The next prime is 11231221012787. The reversal of 11231221012758 is 85721012213211.

11231221012758 is a `hidden beast` number, since 1 + 1 + 2 + 312 + 210 + 127 + 5 + 8 = 666.

11231221012758 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11231221012758² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231221012751) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18351668016 + ... + 18351668627.

It is an arithmetic number, because the mean of its divisors is an integer number (1073572596837).

Almost surely, 2^{11231221012758} is an apocalyptic number.

11231221012758 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11231221012758 is an abundant number, since it is smaller than the sum of its proper divisors (14534521311330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11231221012758 is a wasteful number, since it uses less digits than its factorization.

11231221012758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36703336668 (or 36703336665 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

Adding to 11231221012758 its reverse (85721012213211), we get a palindrome (96952233225969).

The spelling of 11231221012758 in words is "eleven trillion, two hundred thirty-one billion, two hundred twenty-one million, twelve thousand, seven hundred fifty-eight".