213212222021123 has 16 divisors (see below), whose sum is σ = 230343077247360. Its totient is φ = 196185670482816.

The previous prime is 213212222021111. The next prime is 213212222021209. The reversal of 213212222021123 is 321120222212312.

It is a cyclic number.

It is not a de Polignac number, because 213212222021123 - 2⁸ = 213212222020867 is a prime.

It is a super-2 number, since 2×213212222021123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213212222021092 and 213212222021101.

It is not an unprimeable number, because it can be changed into a prime (213212222221123) 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, 175398086 + ... + 176609492.

It is an arithmetic number, because the mean of its divisors is an integer number (14396442327960).

Almost surely, 2^{213212222021123} is an apocalyptic number.

213212222021123 is a deficient number, since it is larger than the sum of its proper divisors (17130855226237).

213212222021123 is a wasteful number, since it uses less digits than its factorization.

213212222021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254446.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 213212222021123 its reverse (321120222212312), we get a palindrome (534332444233435).

The spelling of 213212222021123 in words is "two hundred thirteen trillion, two hundred twelve billion, two hundred twenty-two million, twenty-one thousand, one hundred twenty-three".