111212202221121 has 32 divisors (see below), whose sum is σ = 152335062282240. Its totient is φ = 72144488304000.

The previous prime is 111212202221069. The next prime is 111212202221137. The reversal of 111212202221121 is 121122202212111.

It is not a de Polignac number, because 111212202221121 - 2²⁹ = 111211665350209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111212202231121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106296 + ... + 14914278.

It is an arithmetic number, because the mean of its divisors is an integer number (4760470696320).

Almost surely, 2^{111212202221121} is an apocalyptic number.

It is an amenable number.

111212202221121 is a deficient number, since it is larger than the sum of its proper divisors (41122860061119).

111212202221121 is a wasteful number, since it uses less digits than its factorization.

111212202221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14808477.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 111212202221121 its reverse (121122202212111), we get a palindrome (232334404433232).

The spelling of 111212202221121 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred two million, two hundred twenty-one thousand, one hundred twenty-one".