111021222120221 has 8 divisors (see below), whose sum is σ = 127264724193984. Its totient is φ = 94873551917760.

The previous prime is 111021222120199. The next prime is 111021222120311. The reversal of 111021222120221 is 122021222120111.

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

It is not a de Polignac number, because 111021222120221 - 2¹⁸ = 111021221858077 is a prime.

It is a super-2 number, since 2×111021222120221² (a number of 29 digits) contains 22 as substring.

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 = 111021222120193 and 111021222120202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021222320221) 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, 23957965340 + ... + 23957969973.

It is an arithmetic number, because the mean of its divisors is an integer number (15908090524248).

Almost surely, 2^{111021222120221} is an apocalyptic number.

It is an amenable number.

111021222120221 is a deficient number, since it is larger than the sum of its proper divisors (16243502073763).

111021222120221 is an equidigital number, since it uses as much as digits as its factorization.

111021222120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47915935651.

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

Adding to 111021222120221 its reverse (122021222120111), we get a palindrome (233042444240332).

The spelling of 111021222120221 in words is "one hundred eleven trillion, twenty-one billion, two hundred twenty-two million, one hundred twenty thousand, two hundred twenty-one".