1001221101011 has 8 divisors (see below), whose sum is σ = 1061922461040. Its totient is φ = 940720407808.

The previous prime is 1001221100987. The next prime is 1001221101047. The reversal of 1001221101011 is 1101011221001.

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 1001221101011 - 2⁶ = 1001221100947 is a prime.

It is a super-3 number, since 3×1001221101011³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001221100983 and 1001221101001.

It is not an unprimeable number, because it can be changed into a prime (1001221101511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50156426 + ... + 50176383.

It is an arithmetic number, because the mean of its divisors is an integer number (132740307630).

Almost surely, 2^{1001221101011} is an apocalyptic number.

1001221101011 is a deficient number, since it is larger than the sum of its proper divisors (60701360029).

1001221101011 is a wasteful number, since it uses less digits than its factorization.

1001221101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100333413.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1001221101011 its reverse (1101011221001), we get a palindrome (2102232322012).

The spelling of 1001221101011 in words is "one trillion, one billion, two hundred twenty-one million, one hundred one thousand, eleven".