11211122012 has 24 divisors (see below), whose sum is σ = 20016197712. Its totient is φ = 5492489600.

The previous prime is 11211122009. The next prime is 11211122033. The reversal of 11211122012 is 21022111211.

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, 126587 + ... + 196077.

It is an arithmetic number, because the mean of its divisors is an integer number (834008238).

Almost surely, 2^11211122012 is an apocalyptic number.

It is an amenable number.

11211122012 is a deficient number, since it is larger than the sum of its proper divisors (8805075700).

11211122012 is a wasteful number, since it uses less digits than its factorization.

11211122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70309 (or 70307 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11211122012 its reverse (21022111211), we get a palindrome (32233233223).

The spelling of 11211122012 in words is "eleven billion, two hundred eleven million, one hundred twenty-two thousand, twelve".