11211122052 has 72 divisors (see below), whose sum is σ = 30535517376. Its totient is φ = 3447728064.

The previous prime is 11211122033. The next prime is 11211122057. The reversal of 11211122052 is 25022111211.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11211122057) 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, 1055673 + ... + 1066239.

It is an arithmetic number, because the mean of its divisors is an integer number (424104408).

Almost surely, 2^11211122052 is an apocalyptic number.

11211122052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11211122052 is an abundant number, since it is smaller than the sum of its proper divisors (19324395324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11211122052 is a wasteful number, since it uses less digits than its factorization.

11211122052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12857 (or 12852 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 11211122052 its reverse (25022111211), we get a palindrome (36233233263).

The spelling of 11211122052 in words is "eleven billion, two hundred eleven million, one hundred twenty-two thousand, fifty-two".