2001120012221 has 8 divisors (see below), whose sum is σ = 2184730997088. Its totient is φ = 1817790858000.

The previous prime is 2001120012217. The next prime is 2001120012259. The reversal of 2001120012221 is 1222100211002.

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 2001120012221 - 2² = 2001120012217 is a prime.

It is a super-2 number, since 2×2001120012221² (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 = 2001120012196 and 2001120012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001120012721) 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, 70442810 + ... + 70471211.

It is an arithmetic number, because the mean of its divisors is an integer number (273091374636).

Almost surely, 2^{2001120012221} is an apocalyptic number.

It is an amenable number.

2001120012221 is a deficient number, since it is larger than the sum of its proper divisors (183610984867).

2001120012221 is a wasteful number, since it uses less digits than its factorization.

2001120012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140915323.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2001120012221 its reverse (1222100211002), we get a palindrome (3223220223223).

The spelling of 2001120012221 in words is "two trillion, one billion, one hundred twenty million, twelve thousand, two hundred twenty-one".