11156538521123 has 4 divisors (see below), whose sum is σ = 11180951078520. Its totient is φ = 11132125963728.

The previous prime is 11156538521111. The next prime is 11156538521147. The reversal of 11156538521123 is 32112583565111.

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

It is a cyclic number.

It is not a de Polignac number, because 11156538521123 - 2¹² = 11156538517027 is a prime.

It is a super-2 number, since 2×11156538521123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11156538521923) 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, 12206278013 + ... + 12206278926.

It is an arithmetic number, because the mean of its divisors is an integer number (2795237769630).

Almost surely, 2^{11156538521123} is an apocalyptic number.

11156538521123 is a deficient number, since it is larger than the sum of its proper divisors (24412557397).

11156538521123 is an equidigital number, since it uses as much as digits as its factorization.

11156538521123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24412557396.

The product of its digits is 216000, while the sum is 44.

The spelling of 11156538521123 in words is "eleven trillion, one hundred fifty-six billion, five hundred thirty-eight million, five hundred twenty-one thousand, one hundred twenty-three".