1001201221011 has 8 divisors (see below), whose sum is σ = 1377997379584. Its totient is φ = 645936271560.

The previous prime is 1001201220997. The next prime is 1001201221049. The reversal of 1001201221011 is 1101221021001.

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

It is not a de Polignac number, because 1001201221011 - 2⁷ = 1001201220883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001201221051) 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, 5382802171 + ... + 5382802356.

It is an arithmetic number, because the mean of its divisors is an integer number (172249672448).

Almost surely, 2^{1001201221011} is an apocalyptic number.

1001201221011 is a deficient number, since it is larger than the sum of its proper divisors (376796158573).

1001201221011 is a wasteful number, since it uses less digits than its factorization.

1001201221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10765604561.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1001201221011 its reverse (1101221021001), we get a palindrome (2102422242012).

The spelling of 1001201221011 in words is "one trillion, one billion, two hundred one million, two hundred twenty-one thousand, eleven".