2001121022 has 8 divisors (see below), whose sum is σ = 3005587200. Its totient is φ = 999258624.

The previous prime is 2001121019. The next prime is 2001121033. The reversal of 2001121022 is 2201211002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2001120994 and 2001121012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649022 + ... + 652097.

It is an arithmetic number, because the mean of its divisors is an integer number (375698400).

Almost surely, 2^2001121022 is an apocalyptic number.

2001121022 is a deficient number, since it is larger than the sum of its proper divisors (1004466178).

2001121022 is a wasteful number, since it uses less digits than its factorization.

2001121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301890.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2001121022 is about 44733.8912011911. The cubic root of 2001121022 is about 1260.1564057964.

Adding to 2001121022 its reverse (2201211002), we get a palindrome (4202332024).

The spelling of 2001121022 in words is "two billion, one million, one hundred twenty-one thousand, twenty-two".