2001221021019 has 8 divisors (see below), whose sum is σ = 2910866939712. Its totient is φ = 1212861224840.

The previous prime is 2001221021011. The next prime is 2001221021039. The reversal of 2001221021019 is 9101201221002.

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

It is a cyclic number.

It is not a de Polignac number, because 2001221021019 - 2³ = 2001221021011 is a prime.

It is a super-2 number, since 2×2001221021019² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2001221020986 and 2001221021004.

It is not an unprimeable number, because it can be changed into a prime (2001221021011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30321530589 + ... + 30321530654.

It is an arithmetic number, because the mean of its divisors is an integer number (363858367464).

Almost surely, 2^{2001221021019} is an apocalyptic number.

2001221021019 is a deficient number, since it is larger than the sum of its proper divisors (909645918693).

2001221021019 is a wasteful number, since it uses less digits than its factorization.

2001221021019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60643061257.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 2001221021019 in words is "two trillion, one billion, two hundred twenty-one million, twenty-one thousand, nineteen".