212021323423 has 32 divisors (see below), whose sum is σ = 261752020992. Its totient is φ = 167238000000.

The previous prime is 212021323351. The next prime is 212021323463. The reversal of 212021323423 is 324323120212.

It is a cyclic number.

It is not a de Polignac number, because 212021323423 - 2²⁹ = 211484452511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021323463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44624298 + ... + 44629048.

It is an arithmetic number, because the mean of its divisors is an integer number (8179750656).

Almost surely, 2^212021323423 is an apocalyptic number.

212021323423 is a deficient number, since it is larger than the sum of its proper divisors (49730697569).

212021323423 is a wasteful number, since it uses less digits than its factorization.

212021323423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6175.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 212021323423 its reverse (324323120212), we get a palindrome (536344443635).

The spelling of 212021323423 in words is "two hundred twelve billion, twenty-one million, three hundred twenty-three thousand, four hundred twenty-three".