111212201011021 has 16 divisors (see below), whose sum is σ = 121389722454528. Its totient is φ = 101045907169200.

The previous prime is 111212201010947. The next prime is 111212201011061. The reversal of 111212201011021 is 120110102212111.

It is a cyclic number.

It is not a de Polignac number, because 111212201011021 - 2¹¹ = 111212201008973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111212201010986 and 111212201011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212201011061) 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, 314862406 + ... + 315215416.

It is an arithmetic number, because the mean of its divisors is an integer number (7586857653408).

Almost surely, 2^{111212201011021} is an apocalyptic number.

111212201011021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111212201011021 is a deficient number, since it is larger than the sum of its proper divisors (10177521443507).

111212201011021 is a wasteful number, since it uses less digits than its factorization.

111212201011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368832.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 111212201011021 its reverse (120110102212111), we get a palindrome (231322303223132).

The spelling of 111212201011021 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred one million, eleven thousand, twenty-one".