22011111212 has 6 divisors (see below), whose sum is σ = 38519444628. Its totient is φ = 11005555604.

The previous prime is 22011111191. The next prime is 22011111259. The reversal of 22011111212 is 21211111022.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2751388898 + ... + 2751388905.

It is an arithmetic number, because the mean of its divisors is an integer number (6419907438).

Almost surely, 2^22011111212 is an apocalyptic number.

It is an amenable number.

22011111212 is a deficient number, since it is larger than the sum of its proper divisors (16508333416).

22011111212 is a wasteful number, since it uses less digits than its factorization.

22011111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5502777807 (or 5502777805 counting only the distinct ones).

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

Adding to 22011111212 its reverse (21211111022), we get a palindrome (43222222234).

The spelling of 22011111212 in words is "twenty-two billion, eleven million, one hundred eleven thousand, two hundred twelve".