10212132121 has 4 divisors (see below), whose sum is σ = 10212464052. Its totient is φ = 10211800192.

The previous prime is 10212132083. The next prime is 10212132149. The reversal of 10212132121 is 12123121201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7235884096 + 2976248025 = 85064^2 + 54555^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212132121 - 2¹⁷ = 10212001049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10212132095 and 10212132104.

It is not an unprimeable number, because it can be changed into a prime (10212132191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114496 + ... + 183121.

It is an arithmetic number, because the mean of its divisors is an integer number (2553116013).

Almost surely, 2^10212132121 is an apocalyptic number.

It is an amenable number.

10212132121 is a deficient number, since it is larger than the sum of its proper divisors (331931).

10212132121 is an equidigital number, since it uses as much as digits as its factorization.

10212132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331930.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 10212132121 its reverse (12123121201), we get a palindrome (22335253322).

The spelling of 10212132121 in words is "ten billion, two hundred twelve million, one hundred thirty-two thousand, one hundred twenty-one".