10001020111 has 4 divisors (see below), whose sum is σ = 10003240672. Its totient is φ = 9998799552.

The previous prime is 10001020093. The next prime is 10001020123. The reversal of 10001020111 is 11102010001.

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 10001020111 - 2⁷ = 10001019983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001020094 and 10001020103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001020181) 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, 1103511 + ... + 1112536.

It is an arithmetic number, because the mean of its divisors is an integer number (2500810168).

Almost surely, 2^10001020111 is an apocalyptic number.

10001020111 is a deficient number, since it is larger than the sum of its proper divisors (2220561).

10001020111 is an equidigital number, since it uses as much as digits as its factorization.

10001020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220560.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 10001020111 its reverse (11102010001), we get a palindrome (21103030112).

The spelling of 10001020111 in words is "ten billion, one million, twenty thousand, one hundred eleven".