22211021212212 has 96 divisors (see below), whose sum is σ = 63065899008000. Its totient is φ = 6070092727776.

The previous prime is 22211021212199. The next prime is 22211021212217. The reversal of 22211021212212 is 21221212011222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211021212217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117215412 + ... + 117404747.

It is an arithmetic number, because the mean of its divisors is an integer number (656936448000).

Almost surely, 2^{22211021212212} is an apocalyptic number.

It is an amenable number.

22211021212212 is an abundant number, since it is smaller than the sum of its proper divisors (40854877795788).

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

22211021212212 is a wasteful number, since it uses less digits than its factorization.

22211021212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234620210 (or 234620194 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22211021212212 its reverse (21221212011222), we get a palindrome (43432233223434).

The spelling of 22211021212212 in words is "twenty-two trillion, two hundred eleven billion, twenty-one million, two hundred twelve thousand, two hundred twelve".