121010101213 has 4 divisors (see below), whose sum is σ = 121027921948. Its totient is φ = 120992280480.

The previous prime is 121010101189. The next prime is 121010101229. The reversal of 121010101213 is 312101010121.

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 55902454969 + 65107646244 = 236437^2 + 255162^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121010101213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121010101193 and 121010101202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010101283) 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, 8900178 + ... + 8913763.

It is an arithmetic number, because the mean of its divisors is an integer number (30256980487).

Almost surely, 2^121010101213 is an apocalyptic number.

It is an amenable number.

121010101213 is a deficient number, since it is larger than the sum of its proper divisors (17820735).

121010101213 is an equidigital number, since it uses as much as digits as its factorization.

121010101213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17820734.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 121010101213 its reverse (312101010121), we get a palindrome (433111111334).

It can be divided in two parts, 12101010121 and 3, that multiplied together give a palindrome (36303030363).

The spelling of 121010101213 in words is "one hundred twenty-one billion, ten million, one hundred one thousand, two hundred thirteen".