120111112112221 has 8 divisors (see below), whose sum is σ = 128343228270840. Its totient is φ = 112008635578368.

The previous prime is 120111112112203. The next prime is 120111112112239. The reversal of 120111112112221 is 122211211111021.

It is an interprime number because it is at equal distance from previous prime (120111112112203) and next prime (120111112112239).

It can be written as a sum of positive squares in 4 ways, for example, as 68659685220996 + 51451426891225 = 8286114^2 + 7172965^2 .

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 120111112112221 - 2¹⁹ = 120111111587933 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 (120111112112281) 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, 32409904276 + ... + 32409907981.

It is an arithmetic number, because the mean of its divisors is an integer number (16042903533855).

Almost surely, 2^{120111112112221} is an apocalyptic number.

It is an amenable number.

120111112112221 is a deficient number, since it is larger than the sum of its proper divisors (8232116158619).

120111112112221 is a wasteful number, since it uses less digits than its factorization.

120111112112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64819812383.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 120111112112221 its reverse (122211211111021), we get a palindrome (242322323223242).

The spelling of 120111112112221 in words is "one hundred twenty trillion, one hundred eleven billion, one hundred twelve million, one hundred twelve thousand, two hundred twenty-one".