22201022101212 has 144 divisors (see below), whose sum is σ = 58079932170624. Its totient is φ = 7145562240000.

The previous prime is 22201022101211. The next prime is 22201022101241. The reversal of 22201022101212 is 21210122010222.

It is a happy number.

22201022101212 is a `hidden beast` number, since 2 + 220 + 10 + 221 + 0 + 1 + 212 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201022101211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 399048637 + ... + 399104267.

It is an arithmetic number, because the mean of its divisors is an integer number (403332862296).

Almost surely, 2^{22201022101212} 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 22201022101212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29039966085312).

22201022101212 is an abundant number, since it is smaller than the sum of its proper divisors (35878910069412).

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

22201022101212 is a wasteful number, since it uses less digits than its factorization.

22201022101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58460 (or 58455 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22201022101212 its reverse (21210122010222), we get a palindrome (43411144111434).

The spelling of 22201022101212 in words is "twenty-two trillion, two hundred one billion, twenty-two million, one hundred one thousand, two hundred twelve".