2001201221120 has 40 divisors (see below), whose sum is σ = 4798192621464. Its totient is φ = 800480487424.

The previous prime is 2001201221119. The next prime is 2001201221137. The reversal of 2001201221120 is 211221021002.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 2001201221095 and 2001201221104.

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, 390857054 + ... + 390862173.

Almost surely, 2^{2001201221120} is an apocalyptic number.

2001201221120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001201221120 is an abundant number, since it is smaller than the sum of its proper divisors (2796991400344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001201221120 is an frugal number, since it uses more digits than its factorization.

2001201221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781719250 (or 781719234 counting only the distinct ones).

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

Adding to 2001201221120 its reverse (211221021002), we get a palindrome (2212422242122).

The spelling of 2001201221120 in words is "two trillion, one billion, two hundred one million, two hundred twenty-one thousand, one hundred twenty".