2001221012219 has 48 divisors (see below), whose sum is σ = 2491665662880. Its totient is φ = 1590842373120.

The previous prime is 2001221012209. The next prime is 2001221012291. The reversal of 2001221012219 is 9122101221002.

It is not a de Polignac number, because 2001221012219 - 2¹² = 2001221008123 is a prime.

It is a super-2 number, since 2×2001221012219² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001221012194 and 2001221012203.

It is not an unprimeable number, because it can be changed into a prime (2001221012209) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2507087 + ... + 3207479.

It is an arithmetic number, because the mean of its divisors is an integer number (51909701310).

Almost surely, 2^{2001221012219} is an apocalyptic number.

2001221012219 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2001221012219 is a deficient number, since it is larger than the sum of its proper divisors (490444650661).

2001221012219 is a wasteful number, since it uses less digits than its factorization.

2001221012219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700512 (or 700499 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 2001221012219 in words is "two trillion, one billion, two hundred twenty-one million, twelve thousand, two hundred nineteen".