212101203123 has 24 divisors (see below), whose sum is σ = 322584646800. Its totient is φ = 133920609984.

The previous prime is 212101203049. The next prime is 212101203151. The reversal of 212101203123 is 321302101212.

212101203123 is a `hidden beast` number, since 21 + 210 + 120 + 312 + 3 = 666.

It is not a de Polignac number, because 212101203123 - 2¹² = 212101199027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212101203096 and 212101203105.

It is not an unprimeable number, because it can be changed into a prime (212101203323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 433893 + ... + 782601.

It is an arithmetic number, because the mean of its divisors is an integer number (13441026950).

Almost surely, 2^212101203123 is an apocalyptic number.

212101203123 is a deficient number, since it is larger than the sum of its proper divisors (110483443677).

212101203123 is a wasteful number, since it uses less digits than its factorization.

212101203123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352291 (or 352288 counting only the distinct ones).

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

Adding to 212101203123 its reverse (321302101212), we get a palindrome (533403304335).

The spelling of 212101203123 in words is "two hundred twelve billion, one hundred one million, two hundred three thousand, one hundred twenty-three".