212021332123 has 16 divisors (see below), whose sum is σ = 223413013152. Its totient is φ = 201007584000.

The previous prime is 212021332121. The next prime is 212021332157. The reversal of 212021332123 is 321233120212.

It is not a de Polignac number, because 212021332123 - 2¹ = 212021332121 is a prime.

It is a super-2 number, since 2×212021332123² (a number of 23 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 = 212021332094 and 212021332103.

It is not an unprimeable number, because it can be changed into a prime (212021332121) 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, 303108 + ... + 718273.

It is an arithmetic number, because the mean of its divisors is an integer number (13963313322).

Almost surely, 2^212021332123 is an apocalyptic number.

212021332123 is a deficient number, since it is larger than the sum of its proper divisors (11391681029).

212021332123 is a wasteful number, since it uses less digits than its factorization.

212021332123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021566.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 212021332123 its reverse (321233120212), we get a palindrome (533254452335).

The spelling of 212021332123 in words is "two hundred twelve billion, twenty-one million, three hundred thirty-two thousand, one hundred twenty-three".