111221211220022 has 16 divisors (see below), whose sum is σ = 166916174040000. Its totient is φ = 55582488092040.

The previous prime is 111221211220013. The next prime is 111221211220027. The reversal of 111221211220022 is 220022112122111.

It is a junction number, because it is equal to n+sod(n) for n = 111221211219976 and 111221211220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221211220027) 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, 150334997 + ... + 151073007.

It is an arithmetic number, because the mean of its divisors is an integer number (10432260877500).

Almost surely, 2^{111221211220022} is an apocalyptic number.

111221211220022 is a deficient number, since it is larger than the sum of its proper divisors (55694962819978).

111221211220022 is a wasteful number, since it uses less digits than its factorization.

111221211220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776011.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111221211220022 its reverse (220022112122111), we get a palindrome (331243323342133).

The spelling of 111221211220022 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, twenty-two".