1020010111 has 4 divisors (see below), whose sum is σ = 1020249000. Its totient is φ = 1019771224.

The previous prime is 1020010099. The next prime is 1020010163. The reversal of 1020010111 is 1110100201.

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 1020010111 - 2¹³ = 1020001919 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1020010094 and 1020010103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020010171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112921 + ... + 121618.

It is an arithmetic number, because the mean of its divisors is an integer number (255062250).

Almost surely, 2^1020010111 is an apocalyptic number.

1020010111 is a deficient number, since it is larger than the sum of its proper divisors (238889).

1020010111 is an equidigital number, since it uses as much as digits as its factorization.

1020010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238888.

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

The square root of 1020010111 is about 31937.5971387955. The cubic root of 1020010111 is about 1006.6260356806.

Adding to 1020010111 its reverse (1110100201), we get a palindrome (2130110312).

The spelling of 1020010111 in words is "one billion, twenty million, ten thousand, one hundred eleven".