121222212112111 has 8 divisors (see below), whose sum is σ = 132245539501824. Its totient is φ = 110199405770520.

The previous prime is 121222212112097. The next prime is 121222212112139. The reversal of 121222212112111 is 111211212222121.

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

It is not a de Polignac number, because 121222212112111 - 2¹⁵ = 121222212079343 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 (121222212112171) 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, 129775495 + ... + 130706248.

It is an arithmetic number, because the mean of its divisors is an integer number (16530692437728).

Almost surely, 2^{121222212112111} is an apocalyptic number.

121222212112111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121222212112111 is a deficient number, since it is larger than the sum of its proper divisors (11023327389713).

121222212112111 is a wasteful number, since it uses less digits than its factorization.

121222212112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260524061.

The product of its digits is 128, while the sum is 22.

Adding to 121222212112111 its reverse (111211212222121), we get a palindrome (232433424334232).

The spelling of 121222212112111 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred twelve million, one hundred twelve thousand, one hundred eleven".