101211111111 has 32 divisors (see below), whose sum is σ = 147604697856. Its totient is φ = 61178400000.

The previous prime is 101211111061. The next prime is 101211111119. The reversal of 101211111111 is 111111112101.

It is not a de Polignac number, because 101211111111 - 2⁷ = 101211110983 is a prime.

101211111111 is a modest number, since divided by 111111 gives 101211 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101211111119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28775925 + ... + 28779441.

It is an arithmetic number, because the mean of its divisors is an integer number (4612646808).

Almost surely, 2^101211111111 is an apocalyptic number.

101211111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

101211111111 is a deficient number, since it is larger than the sum of its proper divisors (46393586745).

101211111111 is a wasteful number, since it uses less digits than its factorization.

101211111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5583.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 101211111111 its reverse (111111112101), we get a palindrome (212322223212).

It can be divided in two parts, 10 and 1211111111, that added together give a palindrome (1211111121).

The spelling of 101211111111 in words is "one hundred one billion, two hundred eleven million, one hundred eleven thousand, one hundred eleven".