201001211022222 has 144 divisors (see below), whose sum is σ = 499538947497408. Its totient is φ = 58182942504960.

The previous prime is 201001211022181. The next prime is 201001211022259. The reversal of 201001211022222 is 222220112100102.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 201001211022195 and 201001211022204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 117107643 + ... + 118811625.

It is an arithmetic number, because the mean of its divisors is an integer number (3469020468732).

Almost surely, 2^{201001211022222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201001211022222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249769473748704).

201001211022222 is an abundant number, since it is smaller than the sum of its proper divisors (298537736475186).

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

201001211022222 is a wasteful number, since it uses less digits than its factorization.

201001211022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706315 (or 1706299 counting only the distinct ones).

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

Adding to 201001211022222 its reverse (222220112100102), we get a palindrome (423221323122324).

The spelling of 201001211022222 in words is "two hundred one trillion, one billion, two hundred eleven million, twenty-two thousand, two hundred twenty-two".