201201022111122 has 192 divisors, whose sum is σ = 488500497838080. Its totient is φ = 59338735315200.

The previous prime is 201201022111109. The next prime is 201201022111123. The reversal of 201201022111122 is 221111220102102.

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 = 201201022111095 and 201201022111104.

It is not an unprimeable number, because it can be changed into a prime (201201022111123) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 396117843 + ... + 396625449.

It is an arithmetic number, because the mean of its divisors is an integer number (2544273426240).

Almost surely, 2^{201201022111122} is an apocalyptic number.

201201022111122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 201201022111122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244250248919040).

201201022111122 is an abundant number, since it is smaller than the sum of its proper divisors (287299475726958).

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

201201022111122 is a wasteful number, since it uses less digits than its factorization.

201201022111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508069 (or 508066 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201201022111122 its reverse (221111220102102), we get a palindrome (422312242213224).

The spelling of 201201022111122 in words is "two hundred one trillion, two hundred one billion, twenty-two million, one hundred eleven thousand, one hundred twenty-two".