121230101213 has 6 divisors (see below), whose sum is σ = 131272831674. Its totient is φ = 111904708656.

The previous prime is 121230101173. The next prime is 121230101219. The reversal of 121230101213 is 312101032121.

It can be written as a sum of positive squares in 3 ways, for example, as 2181529 + 121227919684 = 1477^2 + 348178^2 .

It is not a de Polignac number, because 121230101213 - 2²² = 121225906909 is a prime.

It is a super-2 number, since 2×121230101213² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121230101191 and 121230101200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121230101219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 358668770 + ... + 358669107.

It is an arithmetic number, because the mean of its divisors is an integer number (21878805279).

Almost surely, 2^121230101213 is an apocalyptic number.

121230101213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121230101213 is a deficient number, since it is larger than the sum of its proper divisors (10042730461).

121230101213 is an equidigital number, since it uses as much as digits as its factorization.

121230101213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717337903 (or 717337890 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121230101213 its reverse (312101032121), we get a palindrome (433331133334).

The spelling of 121230101213 in words is "one hundred twenty-one billion, two hundred thirty million, one hundred one thousand, two hundred thirteen".