212101320123 has 128 divisors (see below), whose sum is σ = 398536704000. Its totient is φ = 108289509120.

The previous prime is 212101320083. The next prime is 212101320191. The reversal of 212101320123 is 321023101212.

212101320123 is a `hidden beast` number, since 212 + 10 + 1 + 320 + 123 = 666.

It is not a de Polignac number, because 212101320123 - 2⁹ = 212101319611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212101320096 and 212101320105.

It is not an unprimeable number, because it can be changed into a prime (212101320023) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 37279863 + ... + 37285551.

It is an arithmetic number, because the mean of its divisors is an integer number (3113568000).

Almost surely, 2^212101320123 is an apocalyptic number.

212101320123 is a deficient number, since it is larger than the sum of its proper divisors (186435383877).

212101320123 is a wasteful number, since it uses less digits than its factorization.

212101320123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6022 (or 6016 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212101320123 its reverse (321023101212), we get a palindrome (533124421335).

Subtracting 212101320123 from its reverse (321023101212), we obtain a square (108921781089 = 330033²).

The spelling of 212101320123 in words is "two hundred twelve billion, one hundred one million, three hundred twenty thousand, one hundred twenty-three".