111021210122221 has 8 divisors (see below), whose sum is σ = 128487476453120. Its totient is φ = 93956467155408.

The previous prime is 111021210122213. The next prime is 111021210122237. The reversal of 111021210122221 is 122221012120111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111021210122221 - 2³ = 111021210122213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021210122261) 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, 100380840426 + ... + 100380841531.

It is an arithmetic number, because the mean of its divisors is an integer number (16060934556640).

Almost surely, 2^{111021210122221} is an apocalyptic number.

It is an amenable number.

111021210122221 is a deficient number, since it is larger than the sum of its proper divisors (17466266330899).

111021210122221 is an equidigital number, since it uses as much as digits as its factorization.

111021210122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200761682043.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111021210122221 its reverse (122221012120111), we get a palindrome (233242222242332).

The spelling of 111021210122221 in words is "one hundred eleven trillion, twenty-one billion, two hundred ten million, one hundred twenty-two thousand, two hundred twenty-one".