101212011111 has 16 divisors (see below), whose sum is σ = 137512740960. Its totient is φ = 66193296000.

The previous prime is 101212011067. The next prime is 101212011139. The reversal of 101212011111 is 111110212101.

It is not a de Polignac number, because 101212011111 - 2¹⁰ = 101212010087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101212011161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1400361 + ... + 1470861.

It is an arithmetic number, because the mean of its divisors is an integer number (8594546310).

Almost surely, 2^101212011111 is an apocalyptic number.

101212011111 is a deficient number, since it is larger than the sum of its proper divisors (36300729849).

101212011111 is an equidigital number, since it uses as much as digits as its factorization.

101212011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79586.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 101212011111 its reverse (111110212101), we get a palindrome (212322223212).

The spelling of 101212011111 in words is "one hundred one billion, two hundred twelve million, eleven thousand, one hundred eleven".