212102031111 has 16 divisors (see below), whose sum is σ = 292407833088. Its totient is φ = 136663256000.

The previous prime is 212102031079. The next prime is 212102031149. The reversal of 212102031111 is 111130201212.

It is a cyclic number.

It is not a de Polignac number, because 212102031111 - 2⁵ = 212102031079 is a prime.

It is a super-2 number, since 2×212102031111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102031311) 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, 8044815 + ... + 8071136.

It is an arithmetic number, because the mean of its divisors is an integer number (18275489568).

Almost surely, 2^212102031111 is an apocalyptic number.

212102031111 is a deficient number, since it is larger than the sum of its proper divisors (80305801977).

212102031111 is a wasteful number, since it uses less digits than its factorization.

212102031111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16116102.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 212102031111 its reverse (111130201212), we get a palindrome (323232232323).

The spelling of 212102031111 in words is "two hundred twelve billion, one hundred two million, thirty-one thousand, one hundred eleven".