121210210010101 has 4 divisors (see below), whose sum is σ = 121211678221804. Its totient is φ = 121208741798400.

The previous prime is 121210210010083. The next prime is 121210210010159. The reversal of 121210210010101 is 101010012012121.

It is a happy number.

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 45635023836900 + 75575186173201 = 6755370^2 + 8693399^2 .

It is a cyclic number.

It is not a de Polignac number, because 121210210010101 - 2¹¹ = 121210210008053 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 (121210210010191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733982010 + ... + 734147131.

It is an arithmetic number, because the mean of its divisors is an integer number (30302919555451).

Almost surely, 2^{121210210010101} is an apocalyptic number.

It is an amenable number.

121210210010101 is a deficient number, since it is larger than the sum of its proper divisors (1468211703).

121210210010101 is an equidigital number, since it uses as much as digits as its factorization.

121210210010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468211702.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121210210010101 its reverse (101010012012121), we get a palindrome (222220222022222).

The spelling of 121210210010101 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred ten million, ten thousand, one hundred one".