2001122215 has 8 divisors (see below), whose sum is σ = 2417250528. Its totient is φ = 1590295200.

The previous prime is 2001122143. The next prime is 2001122251. The reversal of 2001122215 is 5122211002.

It is a happy number.

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

It is not a de Polignac number, because 2001122215 - 2¹³ = 2001114023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1324492 + ... + 1326001.

It is an arithmetic number, because the mean of its divisors is an integer number (302156316).

Almost surely, 2^2001122215 is an apocalyptic number.

2001122215 is a deficient number, since it is larger than the sum of its proper divisors (416128313).

2001122215 is a wasteful number, since it uses less digits than its factorization.

2001122215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650649.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2001122215 is about 44733.9045355981. The cubic root of 2001122215 is about 1260.1566562170.

Adding to 2001122215 its reverse (5122211002), we get a palindrome (7123333217).

The spelling of 2001122215 in words is "two billion, one million, one hundred twenty-two thousand, two hundred fifteen".