221002202210121 has 32 divisors (see below), whose sum is σ = 335998444723200. Its totient is φ = 143483206008960.

The previous prime is 221002202210071. The next prime is 221002202210233. The reversal of 221002202210121 is 121012202200122.

It is a happy number.

221002202210121 is a `hidden beast` number, since 2 + 2 + 100 + 220 + 221 + 0 + 121 = 666.

It is not a de Polignac number, because 221002202210121 - 2¹⁵ = 221002202177353 is a prime.

It is a super-2 number, since 2×221002202210121² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221002202210094 and 221002202210103.

It is not an unprimeable number, because it can be changed into a prime (221002212210121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178594041 + ... + 179827238.

It is an arithmetic number, because the mean of its divisors is an integer number (10499951397600).

Almost surely, 2^{221002202210121} is an apocalyptic number.

It is an amenable number.

221002202210121 is a deficient number, since it is larger than the sum of its proper divisors (114996242513079).

221002202210121 is a wasteful number, since it uses less digits than its factorization.

221002202210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358421886 (or 358421880 counting only the distinct ones).

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

Adding to 221002202210121 its reverse (121012202200122), we get a palindrome (342014404410243).

Subtracting from 221002202210121 its reverse (121012202200122), we obtain a palindrome (99990000009999).

The spelling of 221002202210121 in words is "two hundred twenty-one trillion, two billion, two hundred two million, two hundred ten thousand, one hundred twenty-one".