212222100102021 has 12 divisors (see below), whose sum is σ = 309407921645472. Its totient is φ = 140159143991976.

The previous prime is 212222100102017. The next prime is 212222100102031. The reversal of 212222100102021 is 120201001222212.

It is a happy number.

212222100102021 is a `hidden beast` number, since 21 + 222 + 210 + 0 + 10 + 202 + 1 = 666.

212222100102021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212222100102021 - 2² = 212222100102017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212222100101985 and 212222100102003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222100102011) 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, 110188005321 + ... + 110188007246.

It is an arithmetic number, because the mean of its divisors is an integer number (25783993470456).

Almost surely, 2^{212222100102021} is an apocalyptic number.

It is an amenable number.

212222100102021 is a deficient number, since it is larger than the sum of its proper divisors (97185821543451).

212222100102021 is a wasteful number, since it uses less digits than its factorization.

212222100102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220376012680 (or 220376012677 counting only the distinct ones).

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

Adding to 212222100102021 its reverse (120201001222212), we get a palindrome (332423101324233).

The spelling of 212222100102021 in words is "two hundred twelve trillion, two hundred twenty-two billion, one hundred million, one hundred two thousand, twenty-one".