111021222221021 has 32 divisors (see below), whose sum is σ = 134523420902400. Its totient is φ = 89503024688640.

The previous prime is 111021222220969. The next prime is 111021222221057. The reversal of 111021222221021 is 120122222120111.

It is a cyclic number.

It is not a de Polignac number, because 111021222221021 - 2³⁴ = 111004042351837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111021222220984 and 111021222221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021222221081) 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 31 ways as a sum of consecutive naturals, for example, 17383526 + ... + 22896056.

It is an arithmetic number, because the mean of its divisors is an integer number (4203856903200).

Almost surely, 2^{111021222221021} is an apocalyptic number.

It is an amenable number.

111021222221021 is a deficient number, since it is larger than the sum of its proper divisors (23502198681379).

111021222221021 is a wasteful number, since it uses less digits than its factorization.

111021222221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5513649.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111021222221021 its reverse (120122222120111), we get a palindrome (231143444341132).

The spelling of 111021222221021 in words is "one hundred eleven trillion, twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, twenty-one".