212121112022223 has 16 divisors (see below), whose sum is σ = 291705628686336. Its totient is φ = 137034915418400.

The previous prime is 212121112022203. The next prime is 212121112022243. The reversal of 212121112022223 is 322220211121212.

It is an interprime number because it is at equal distance from previous prime (212121112022203) and next prime (212121112022243).

It is a cyclic number.

It is not a de Polignac number, because 212121112022223 - 2⁶ = 212121112022159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212121112022193 and 212121112022202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121112022203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7447535511 + ... + 7447563992.

It is an arithmetic number, because the mean of its divisors is an integer number (18231601792896).

Almost surely, 2^{212121112022223} is an apocalyptic number.

212121112022223 is a deficient number, since it is larger than the sum of its proper divisors (79584516664113).

212121112022223 is a wasteful number, since it uses less digits than its factorization.

212121112022223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14895099654.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 212121112022223 its reverse (322220211121212), we get a palindrome (534341323143435).

The spelling of 212121112022223 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred twelve million, twenty-two thousand, two hundred twenty-three".