22142140421212 has 96 divisors (see below), whose sum is σ = 46363986514944. Its totient is φ = 9046610496000.

The previous prime is 22142140421207. The next prime is 22142140421243. The reversal of 22142140421212 is 21212404124122.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 753093712 + ... + 753123112.

It is an arithmetic number, because the mean of its divisors is an integer number (482958192864).

Almost surely, 2^{22142140421212} 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 22142140421212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23181993257472).

22142140421212 is an abundant number, since it is smaller than the sum of its proper divisors (24221846093732).

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

22142140421212 is a wasteful number, since it uses less digits than its factorization.

22142140421212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33299 (or 33297 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

Adding to 22142140421212 its reverse (21212404124122), we get a palindrome (43354544545334).

The spelling of 22142140421212 in words is "twenty-two trillion, one hundred forty-two billion, one hundred forty million, four hundred twenty-one thousand, two hundred twelve".