221220100111122 has 96 divisors (see below), whose sum is σ = 550141961795712. Its totient is φ = 62934116458752.

The previous prime is 221220100111111. The next prime is 221220100111141. The reversal of 221220100111122 is 221111001022122.

221220100111122 is a `hidden beast` number, since 221 + 220 + 100 + 1 + 1 + 1 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221220100111095 and 221220100111104.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25183333 + ... + 32812199.

It is an arithmetic number, because the mean of its divisors is an integer number (5730645435372).

Almost surely, 2^{221220100111122} is an apocalyptic number.

221220100111122 is an abundant number, since it is smaller than the sum of its proper divisors (328921861684590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221220100111122 is a wasteful number, since it uses less digits than its factorization.

221220100111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7629872 (or 7629869 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221220100111122 its reverse (221111001022122), we get a palindrome (442331101133244).

The spelling of 221220100111122 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred million, one hundred eleven thousand, one hundred twenty-two".