111121212021102 has 32 divisors (see below), whose sum is σ = 247090265523360. Its totient is φ = 37017268185600.

The previous prime is 111121212021091. The next prime is 111121212021103. The reversal of 111121212021102 is 201120212121111.

It is a happy number.

111121212021102 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×111121212021102² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121212021103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 642574453 + ... + 642747360.

It is an arithmetic number, because the mean of its divisors is an integer number (7721570797605).

Almost surely, 2^{111121212021102} is an apocalyptic number.

111121212021102 is an abundant number, since it is smaller than the sum of its proper divisors (135969053502258).

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

111121212021102 is a wasteful number, since it uses less digits than its factorization.

111121212021102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285323425 (or 1285323419 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111121212021102 its reverse (201120212121111), we get a palindrome (312241424142213).

The spelling of 111121212021102 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred twelve million, twenty-one thousand, one hundred two".