22211232012 has 18 divisors (see below), whose sum is σ = 56145058788. Its totient is φ = 7403743992.

The previous prime is 22211231957. The next prime is 22211232019. The reversal of 22211232012 is 21023211222.

22211232012 is a `hidden beast` number, since 222 + 112 + 320 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

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 (22211232019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 308489298 + ... + 308489369.

Almost surely, 2^22211232012 is an apocalyptic number.

It is an amenable number.

22211232012 is an abundant number, since it is smaller than the sum of its proper divisors (33933826776).

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

22211232012 is a wasteful number, since it uses less digits than its factorization.

22211232012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616978677 (or 616978672 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 22211232012 its reverse (21023211222), we get a palindrome (43234443234).

The spelling of 22211232012 in words is "twenty-two billion, two hundred eleven million, two hundred thirty-two thousand, twelve".