10212120101 has 4 divisors (see below), whose sum is σ = 10364539872. Its totient is φ = 10059700332.

The previous prime is 10212120077. The next prime is 10212120143. The reversal of 10212120101 is 10102121201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10102121201 = 31123 ⋅324587.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10212120101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212120301) 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, 76209785 + ... + 76209918.

It is an arithmetic number, because the mean of its divisors is an integer number (2591134968).

Almost surely, 2^10212120101 is an apocalyptic number.

It is an amenable number.

10212120101 is a deficient number, since it is larger than the sum of its proper divisors (152419771).

10212120101 is an equidigital number, since it uses as much as digits as its factorization.

10212120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152419770.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10212120101 its reverse (10102121201), we get a palindrome (20314241302).

The spelling of 10212120101 in words is "ten billion, two hundred twelve million, one hundred twenty thousand, one hundred one".