22121122011 has 16 divisors (see below), whose sum is σ = 30453012480. Its totient is φ = 14268533760.

The previous prime is 22121121991. The next prime is 22121122013. The reversal of 22121122011 is 11022112122.

It is a de Polignac number, because none of the positive numbers 2^k-22121122011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22121122013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440530 + ... + 488168.

It is an arithmetic number, because the mean of its divisors is an integer number (1903313280).

Almost surely, 2^22121122011 is an apocalyptic number.

22121122011 is a deficient number, since it is larger than the sum of its proper divisors (8331890469).

22121122011 is a wasteful number, since it uses less digits than its factorization.

22121122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52666.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22121122011 its reverse (11022112122), we get a palindrome (33143234133).

The spelling of 22121122011 in words is "twenty-two billion, one hundred twenty-one million, one hundred twenty-two thousand, eleven".