22121402012 has 6 divisors (see below), whose sum is σ = 38712453528. Its totient is φ = 11060701004.

The previous prime is 22121402011. The next prime is 22121402021. The reversal of 22121402012 is 21020412122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121402011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2765175248 + ... + 2765175255.

It is an arithmetic number, because the mean of its divisors is an integer number (6452075588).

Almost surely, 2^22121402012 is an apocalyptic number.

It is an amenable number.

22121402012 is a deficient number, since it is larger than the sum of its proper divisors (16591051516).

22121402012 is a wasteful number, since it uses less digits than its factorization.

22121402012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5530350507 (or 5530350505 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22121402012 its reverse (21020412122), we get a palindrome (43141814134).

The spelling of 22121402012 in words is "twenty-two billion, one hundred twenty-one million, four hundred two thousand, twelve".