111212011011 has 16 divisors (see below), whose sum is σ = 149669039520. Its totient is φ = 73448398080.

The previous prime is 111212010997. The next prime is 111212011061. The reversal of 111212011011 is 110110212111.

It is not a de Polignac number, because 111212011011 - 2¹⁴ = 111211994627 is a prime.

It is a super-2 number, since 2×111212011011² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111212011061) 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, 2090401 + ... + 2142941.

It is an arithmetic number, because the mean of its divisors is an integer number (9354314970).

Almost surely, 2^111212011011 is an apocalyptic number.

111212011011 is a deficient number, since it is larger than the sum of its proper divisors (38457028509).

111212011011 is a wasteful number, since it uses less digits than its factorization.

111212011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59126.

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

Adding to 111212011011 its reverse (110110212111), we get a palindrome (221322223122).

It can be divided in two parts, 11121201 and 1011, that multiplied together give a palindrome (11243534211).

The spelling of 111212011011 in words is "one hundred eleven billion, two hundred twelve million, eleven thousand, eleven".