11211222011011 has 24 divisors (see below), whose sum is σ = 12910066274304. Its totient is φ = 9654059625840.

The previous prime is 11211222010991. The next prime is 11211222011089. The reversal of 11211222011011 is 11011022211211.

It is not a de Polignac number, because 11211222011011 - 2¹³ = 11211222002819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211222015011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25061646 + ... + 25505068.

It is an arithmetic number, because the mean of its divisors is an integer number (537919428096).

Almost surely, 2^{11211222011011} is an apocalyptic number.

11211222011011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11211222011011 is a deficient number, since it is larger than the sum of its proper divisors (1698844263293).

11211222011011 is a wasteful number, since it uses less digits than its factorization.

11211222011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449839 (or 449820 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11211222011011 its reverse (11011022211211), we get a palindrome (22222244222222).

The spelling of 11211222011011 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-two million, eleven thousand, eleven".