1001220101111 has 4 divisors (see below), whose sum is σ = 1001295241632. Its totient is φ = 1001144960592.

The previous prime is 1001220101099. The next prime is 1001220101129. The reversal of 1001220101111 is 1111010221001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1001220101111 - 2¹⁸ = 1001219838967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001220101092 and 1001220101101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001220101131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37550270 + ... + 37576923.

It is an arithmetic number, because the mean of its divisors is an integer number (250323810408).

Almost surely, 2^{1001220101111} is an apocalyptic number.

1001220101111 is a deficient number, since it is larger than the sum of its proper divisors (75140521).

1001220101111 is an equidigital number, since it uses as much as digits as its factorization.

1001220101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75140520.

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

Adding to 1001220101111 its reverse (1111010221001), we get a palindrome (2112230322112).

The spelling of 1001220101111 in words is "one trillion, one billion, two hundred twenty million, one hundred one thousand, one hundred eleven".