10021002212221 has 72 divisors (see below), whose sum is σ = 13801857250272. Its totient is φ = 7206309633600.

The previous prime is 10021002212203. The next prime is 10021002212339. The reversal of 10021002212221 is 12221220012001.

It is a happy number.

It is not a de Polignac number, because 10021002212221 - 2⁵ = 10021002212189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10021002212195 and 10021002212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021002212521) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 428767666 + ... + 428791036.

Almost surely, 2^{10021002212221} is an apocalyptic number.

10021002212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10021002212221 is a deficient number, since it is larger than the sum of its proper divisors (3780855038051).

10021002212221 is a wasteful number, since it uses less digits than its factorization.

10021002212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28983 (or 28965 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 10021002212221 its reverse (12221220012001), we get a palindrome (22242222224222).

The spelling of 10021002212221 in words is "ten trillion, twenty-one billion, two million, two hundred twelve thousand, two hundred twenty-one".