22211311212 has 48 divisors (see below), whose sum is σ = 57652314720. Its totient is φ = 7395100416.

The previous prime is 22211311141. The next prime is 22211311229. The reversal of 22211311212 is 21211311222.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27433 + ... + 212544.

It is an arithmetic number, because the mean of its divisors is an integer number (1201089890).

Almost surely, 2^22211311212 is an apocalyptic number.

It is an amenable number.

22211311212 is an abundant number, since it is smaller than the sum of its proper divisors (35441003508).

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

22211311212 is a wasteful number, since it uses less digits than its factorization.

22211311212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240847 (or 240839 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 22211311212 its reverse (21211311222), we get a palindrome (43422622434).

The spelling of 22211311212 in words is "twenty-two billion, two hundred eleven million, three hundred eleven thousand, two hundred twelve".