111121012210021 has 8 divisors (see below), whose sum is σ = 122584977720000. Its totient is φ = 99884055918240.

The previous prime is 111121012209943. The next prime is 111121012210037. The reversal of 111121012210021 is 120012210121111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111121012210021 - 2¹¹ = 111121012207973 is a prime.

It is a super-2 number, since 2×111121012210021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111121012209977 and 111121012210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121012210421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56752303521 + ... + 56752305478.

It is an arithmetic number, because the mean of its divisors is an integer number (15323122215000).

Almost surely, 2^{111121012210021} is an apocalyptic number.

111121012210021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111121012210021 is a deficient number, since it is larger than the sum of its proper divisors (11463965509979).

111121012210021 is a wasteful number, since it uses less digits than its factorization.

111121012210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113504609099.

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

Adding to 111121012210021 its reverse (120012210121111), we get a palindrome (231133222331132).

The spelling of 111121012210021 in words is "one hundred eleven trillion, one hundred twenty-one billion, twelve million, two hundred ten thousand, twenty-one".