10011211111 has 4 divisors (see below), whose sum is σ = 10921321224. Its totient is φ = 9101101000.

The previous prime is 10011211079. The next prime is 10011211117. The reversal of 10011211111 is 11111211001.

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 10011211111 - 2⁵ = 10011211079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011211117) 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, 455055040 + ... + 455055061.

It is an arithmetic number, because the mean of its divisors is an integer number (2730330306).

Almost surely, 2^10011211111 is an apocalyptic number.

10011211111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10011211111 is a deficient number, since it is larger than the sum of its proper divisors (910110113).

10011211111 is an equidigital number, since it uses as much as digits as its factorization.

10011211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910110112.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 10011211111 its reverse (11111211001), we get a palindrome (21122422112).

It can be divided in two parts, 10011 and 211111, that added together give a palindrome (221122).

The spelling of 10011211111 in words is "ten billion, eleven million, two hundred eleven thousand, one hundred eleven".