11213211505 has 16 divisors (see below), whose sum is σ = 14072227200. Its totient is φ = 8561394688.

The previous prime is 11213211491. The next prime is 11213211557. The reversal of 11213211505 is 50511231211.

It is a cyclic number.

It is not a de Polignac number, because 11213211505 - 2⁵ = 11213211473 is a prime.

It is a super-2 number, since 2×11213211505² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56947 + ... + 160216.

It is an arithmetic number, because the mean of its divisors is an integer number (879514200).

Almost surely, 2^11213211505 is an apocalyptic number.

It is an amenable number.

11213211505 is a deficient number, since it is larger than the sum of its proper divisors (2859015695).

11213211505 is a wasteful number, since it uses less digits than its factorization.

11213211505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217640.

The product of its (nonzero) digits is 300, while the sum is 22.

Adding to 11213211505 its reverse (50511231211), we get a palindrome (61724442716).

The spelling of 11213211505 in words is "eleven billion, two hundred thirteen million, two hundred eleven thousand, five hundred five".