22001211212 has 6 divisors (see below), whose sum is σ = 38502119628. Its totient is φ = 11000605604.

The previous prime is 22001211191. The next prime is 22001211217. The reversal of 22001211212 is 21211210022.

It is not an unprimeable number, because it can be changed into a prime (22001211217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2750151398 + ... + 2750151405.

It is an arithmetic number, because the mean of its divisors is an integer number (6417019938).

Almost surely, 2^22001211212 is an apocalyptic number.

It is an amenable number.

22001211212 is a deficient number, since it is larger than the sum of its proper divisors (16500908416).

22001211212 is a wasteful number, since it uses less digits than its factorization.

22001211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500302807 (or 5500302805 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22001211212 its reverse (21211210022), we get a palindrome (43212421234).

The spelling of 22001211212 in words is "twenty-two billion, one million, two hundred eleven thousand, two hundred twelve".