11156213015 has 8 divisors (see below), whose sum is σ = 13548750768. Its totient is φ = 8817440320.

The previous prime is 11156212967. The next prime is 11156213021. The reversal of 11156213015 is 51031265111.

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

It is not a de Polignac number, because 11156213015 - 2¹⁴ = 11156196631 is a prime.

It is a super-2 number, since 2×11156213015² (a number of 21 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 13440806 + ... + 13441635.

It is an arithmetic number, because the mean of its divisors is an integer number (1693593846).

Almost surely, 2^11156213015 is an apocalyptic number.

11156213015 is a deficient number, since it is larger than the sum of its proper divisors (2392537753).

11156213015 is an equidigital number, since it uses as much as digits as its factorization.

11156213015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26882529.

The product of its (nonzero) digits is 900, while the sum is 26.

Adding to 11156213015 its reverse (51031265111), we get a palindrome (62187478126).

The spelling of 11156213015 in words is "eleven billion, one hundred fifty-six million, two hundred thirteen thousand, fifteen".