212103023121 has 112 divisors (see below), whose sum is σ = 364264896960. Its totient is φ = 122253183360.

The previous prime is 212103023081. The next prime is 212103023129. The reversal of 212103023121 is 121320301212.

It is not a de Polignac number, because 212103023121 - 2⁷ = 212103022993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212103023094 and 212103023103.

It is not an unprimeable number, because it can be changed into a prime (212103023129) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 15574111 + ... + 15587723.

Almost surely, 2^212103023121 is an apocalyptic number.

It is an amenable number.

212103023121 is a deficient number, since it is larger than the sum of its proper divisors (152161873839).

212103023121 is a wasteful number, since it uses less digits than its factorization.

212103023121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13738 (or 13723 counting only the distinct ones).

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

Adding to 212103023121 its reverse (121320301212), we get a palindrome (333423324333).

The spelling of 212103023121 in words is "two hundred twelve billion, one hundred three million, twenty-three thousand, one hundred twenty-one".