1012111211 has 4 divisors (see below), whose sum is σ = 1012192032. Its totient is φ = 1012030392.

The previous prime is 1012111189. The next prime is 1012111231. The reversal of 1012111211 is 1121112101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1012111211 - 2⁶ = 1012111147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012111192 and 1012111201.

It is not an unprimeable number, because it can be changed into a prime (1012111231) 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, 17171 + ... + 48156.

It is an arithmetic number, because the mean of its divisors is an integer number (253048008).

Almost surely, 2^1012111211 is an apocalyptic number.

1012111211 is a deficient number, since it is larger than the sum of its proper divisors (80821).

1012111211 is an equidigital number, since it uses as much as digits as its factorization.

1012111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80820.

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

The square root of 1012111211 is about 31813.6953370714. The cubic root of 1012111211 is about 1004.0208811787.

Adding to 1012111211 its reverse (1121112101), we get a palindrome (2133223312).

The spelling of 1012111211 in words is "one billion, twelve million, one hundred eleven thousand, two hundred eleven".