221001102112122 has 96 divisors (see below), whose sum is σ = 489613928918400. Its totient is φ = 72030240285696.

The previous prime is 221001102112121. The next prime is 221001102112177. The reversal of 221001102112122 is 221211201100122.

221001102112122 is a `hidden beast` number, since 221 + 0 + 0 + 110 + 211 + 2 + 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 = 221001102112095 and 221001102112104.

It is not an unprimeable number, because it can be changed into a prime (221001102112121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78079953 + ... + 80860875.

It is an arithmetic number, because the mean of its divisors is an integer number (5100145092900).

Almost surely, 2^{221001102112122} is an apocalyptic number.

221001102112122 is an abundant number, since it is smaller than the sum of its proper divisors (268612826806278).

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

221001102112122 is a wasteful number, since it uses less digits than its factorization.

221001102112122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781572 (or 2781569 counting only the distinct ones).

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

Adding to 221001102112122 its reverse (221211201100122), we get a palindrome (442212303212244).

The spelling of 221001102112122 in words is "two hundred twenty-one trillion, one billion, one hundred two million, one hundred twelve thousand, one hundred twenty-two".