11123021531215 has 32 divisors (see below), whose sum is σ = 14738835831552. Its totient is φ = 7990729440000.

The previous prime is 11123021531161. The next prime is 11123021531243. The reversal of 11123021531215 is 51213512032111.

It is a happy number.

It is not a de Polignac number, because 11123021531215 - 2³¹ = 11120874047567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28846440 + ... + 29229490.

It is an arithmetic number, because the mean of its divisors is an integer number (460588619736).

Almost surely, 2^{11123021531215} is an apocalyptic number.

11123021531215 is a deficient number, since it is larger than the sum of its proper divisors (3615814300337).

11123021531215 is a wasteful number, since it uses less digits than its factorization.

11123021531215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389511.

The product of its (nonzero) digits is 1800, while the sum is 28.

Adding to 11123021531215 its reverse (51213512032111), we get a palindrome (62336533563326).

The spelling of 11123021531215 in words is "eleven trillion, one hundred twenty-three billion, twenty-one million, five hundred thirty-one thousand, two hundred fifteen".