221002100121222 has 96 divisors (see below), whose sum is σ = 562046031153984. Its totient is φ = 61435524384000.

The previous prime is 221002100121221. The next prime is 221002100121287. The reversal of 221002100121222 is 222121001200122.

It is a happy number.

221002100121222 is a `hidden beast` number, since 2 + 210 + 0 + 210 + 0 + 1 + 21 + 222 = 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 = 221002100121195 and 221002100121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002100121221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221324472 + ... + 222320772.

It is an arithmetic number, because the mean of its divisors is an integer number (5854646157854).

Almost surely, 2^{221002100121222} is an apocalyptic number.

221002100121222 is an abundant number, since it is smaller than the sum of its proper divisors (341043931032762).

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

221002100121222 is a wasteful number, since it uses less digits than its factorization.

221002100121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043934 (or 1043931 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221002100121222 its reverse (222121001200122), we get a palindrome (443123101321344).

The spelling of 221002100121222 in words is "two hundred twenty-one trillion, two billion, one hundred million, one hundred twenty-one thousand, two hundred twenty-two".