2001112220122 has 4 divisors (see below), whose sum is σ = 3001668330186. Its totient is φ = 1000556110060.

The previous prime is 2001112220087. The next prime is 2001112220161. The reversal of 2001112220122 is 2210222111002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1774727531721 + 226384688401 = 1332189^2 + 475799^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2001112220096 and 2001112220105.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500278055029 + ... + 500278055032.

Almost surely, 2^{2001112220122} is an apocalyptic number.

2001112220122 is a deficient number, since it is larger than the sum of its proper divisors (1000556110064).

2001112220122 is a wasteful number, since it uses less digits than its factorization.

2001112220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000556110063.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2001112220122 its reverse (2210222111002), we get a palindrome (4211334331124).

The spelling of 2001112220122 in words is "two trillion, one billion, one hundred twelve million, two hundred twenty thousand, one hundred twenty-two".