111231220001222 has 16 divisors (see below), whose sum is σ = 170154803498400. Its totient is φ = 54514926490752.

The previous prime is 111231220001221. The next prime is 111231220001243. The reversal of 111231220001222 is 222100022132111.

It is a junction number, because it is equal to n+sod(n) for n = 111231220001194 and 111231220001203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111231220001221) 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, 493467347 + ... + 493692702.

It is an arithmetic number, because the mean of its divisors is an integer number (10634675218650).

Almost surely, 2^{111231220001222} is an apocalyptic number.

111231220001222 is a deficient number, since it is larger than the sum of its proper divisors (58923583497178).

111231220001222 is a wasteful number, since it uses less digits than its factorization.

111231220001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987161167.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 111231220001222 its reverse (222100022132111), we get a palindrome (333331242133333).

The spelling of 111231220001222 in words is "one hundred eleven trillion, two hundred thirty-one billion, two hundred twenty million, one thousand, two hundred twenty-two".