201001122220122 has 144 divisors (see below), whose sum is σ = 547680941439840. Its totient is φ = 52935877584576.

The previous prime is 201001122220097. The next prime is 201001122220207. The reversal of 201001122220122 is 221022221100102.

It is a happy number.

201001122220122 is a `hidden beast` number, since 201 + 0 + 0 + 1 + 122 + 220 + 122 = 666.

It is a super-2 number, since 2×201001122220122² (a number of 29 digits) contains 22 as substring.

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 = 201001122220095 and 201001122220104.

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, 161465608 + ... + 162705699.

It is an arithmetic number, because the mean of its divisors is an integer number (3803339871110).

Almost surely, 2^{201001122220122} is an apocalyptic number.

201001122220122 is an abundant number, since it is smaller than the sum of its proper divisors (346679819219718).

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

201001122220122 is a wasteful number, since it uses less digits than its factorization.

201001122220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324171385 (or 324171375 counting only the distinct ones).

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

Adding to 201001122220122 its reverse (221022221100102), we get a palindrome (422023343320224).

The spelling of 201001122220122 in words is "two hundred one trillion, one billion, one hundred twenty-two million, two hundred twenty thousand, one hundred twenty-two".