111021001212 has 24 divisors (see below), whose sum is σ = 282598912512. Its totient is φ = 33642727600.

The previous prime is 111021001199. The next prime is 111021001243. The reversal of 111021001212 is 212100120111.

It is a super-2 number, since 2×111021001212² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420533964 + ... + 420534227.

It is an arithmetic number, because the mean of its divisors is an integer number (11774954688).

Almost surely, 2^111021001212 is an apocalyptic number.

111021001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111021001212 is an abundant number, since it is smaller than the sum of its proper divisors (171577911300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111021001212 is a wasteful number, since it uses less digits than its factorization.

111021001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841068209 (or 841068207 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111021001212 its reverse (212100120111), we get a palindrome (323121121323).

The spelling of 111021001212 in words is "one hundred eleven billion, twenty-one million, one thousand, two hundred twelve".