212131432121 has 16 divisors (see below), whose sum is σ = 249379122048. Its totient is φ = 176691369600.

The previous prime is 212131432111. The next prime is 212131432147. The reversal of 212131432121 is 121234131212.

It is a cyclic number.

It is not a de Polignac number, because 212131432121 - 2⁶ = 212131432057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212131432111) 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, 2957300 + ... + 3028181.

It is an arithmetic number, because the mean of its divisors is an integer number (15586195128).

Almost surely, 2^212131432121 is an apocalyptic number.

It is an amenable number.

212131432121 is a deficient number, since it is larger than the sum of its proper divisors (37247689927).

212131432121 is an equidigital number, since it uses as much as digits as its factorization.

212131432121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5985632.

The product of its digits is 576, while the sum is 23.

Adding to 212131432121 its reverse (121234131212), we get a palindrome (333365563333).

The spelling of 212131432121 in words is "two hundred twelve billion, one hundred thirty-one million, four hundred thirty-two thousand, one hundred twenty-one".