212102010202221 has 12 divisors (see below), whose sum is σ = 306391947912960. Its totient is φ = 141391012002120.

The previous prime is 212102010202211. The next prime is 212102010202231. The reversal of 212102010202221 is 122202010201212.

It is a happy number.

212102010202221 is a `hidden beast` number, since 2 + 1 + 210 + 20 + 10 + 202 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (212102010202211) and next prime (212102010202231).

It is not a de Polignac number, because 212102010202221 - 2²¹ = 212102008105069 is a prime.

It is a super-2 number, since 2×212102010202221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212102010202194 and 212102010202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102010202211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 860547661 + ... + 860794098.

It is an arithmetic number, because the mean of its divisors is an integer number (25532662326080).

Almost surely, 2^{212102010202221} is an apocalyptic number.

It is an amenable number.

212102010202221 is a deficient number, since it is larger than the sum of its proper divisors (94289937710739).

212102010202221 is a wasteful number, since it uses less digits than its factorization.

212102010202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721355456 (or 1721355453 counting only the distinct ones).

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

Adding to 212102010202221 its reverse (122202010201212), we get a palindrome (334304020403433).

The spelling of 212102010202221 in words is "two hundred twelve trillion, one hundred two billion, ten million, two hundred two thousand, two hundred twenty-one".