1010020111 has 4 divisors (see below), whose sum is σ = 1022189112. Its totient is φ = 997851112.

The previous prime is 1010020097. The next prime is 1010020153. The reversal of 1010020111 is 1110200101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1110200101 = 43 ⋅25818607.

It is a cyclic number.

It is not a de Polignac number, because 1010020111 - 2⁵ = 1010020079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010020094 and 1010020103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010020171) 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, 6084376 + ... + 6084541.

It is an arithmetic number, because the mean of its divisors is an integer number (255547278).

Almost surely, 2^1010020111 is an apocalyptic number.

1010020111 is a deficient number, since it is larger than the sum of its proper divisors (12169001).

1010020111 is an equidigital number, since it uses as much as digits as its factorization.

1010020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12169000.

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

The square root of 1010020111 is about 31780.8135673082. The cubic root of 1010020111 is about 1003.3289428426.

Adding to 1010020111 its reverse (1110200101), we get a palindrome (2120220212).

The spelling of 1010020111 in words is "one billion, ten million, twenty thousand, one hundred eleven".