22110111001212 has 96 divisors (see below), whose sum is σ = 56058063792192. Its totient is φ = 6742238232576.

The previous prime is 22110111001159. The next prime is 22110111001289. The reversal of 22110111001212 is 21210011101122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22110111001191 and 22110111001200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6498418 + ... + 9297830.

It is an arithmetic number, because the mean of its divisors is an integer number (583938164502).

Almost surely, 2^{22110111001212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22110111001212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28029031896096).

22110111001212 is an abundant number, since it is smaller than the sum of its proper divisors (33947952790980).

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

22110111001212 is a wasteful number, since it uses less digits than its factorization.

22110111001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2799887 (or 2799885 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 22110111001212 its reverse (21210011101122), we get a palindrome (43320122102334).

The spelling of 22110111001212 in words is "twenty-two trillion, one hundred ten billion, one hundred eleven million, one thousand, two hundred twelve".