1002212221221 has 24 divisors (see below), whose sum is σ = 1494480139776. Its totient is φ = 646526999520.

The previous prime is 1002212221189. The next prime is 1002212221243. The reversal of 1002212221221 is 1221222122001.

It is a happy number.

1002212221221 is a `hidden beast` number, since 1 + 0 + 0 + 221 + 2 + 221 + 221 = 666.

It is not a de Polignac number, because 1002212221221 - 2⁵ = 1002212221189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002212221194 and 1002212221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002212221421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2862496 + ... + 3193478.

It is an arithmetic number, because the mean of its divisors is an integer number (62270005824).

Almost surely, 2^{1002212221221} is an apocalyptic number.

It is an amenable number.

1002212221221 is a deficient number, since it is larger than the sum of its proper divisors (492267918555).

1002212221221 is a wasteful number, since it uses less digits than its factorization.

1002212221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341873 (or 341870 counting only the distinct ones).

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

Adding to 1002212221221 its reverse (1221222122001), we get a palindrome (2223434343222).

The spelling of 1002212221221 in words is "one trillion, two billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".