121863674213 has 4 divisors (see below), whose sum is σ = 122386694508. Its totient is φ = 121340653920.

The previous prime is 121863674183. The next prime is 121863674243. The reversal of 121863674213 is 312476368121.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (121863674183) and next prime (121863674243).

It can be written as a sum of positive squares in 2 ways, for example, as 87578707969 + 34284966244 = 295937^2 + 185162^2 .

It is a cyclic number.

It is not a de Polignac number, because 121863674213 - 2⁸ = 121863673957 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 (121863674243) 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 3 ways as a sum of consecutive naturals, for example, 261509798 + ... + 261510263.

It is an arithmetic number, because the mean of its divisors is an integer number (30596673627).

Almost surely, 2^121863674213 is an apocalyptic number.

It is an amenable number.

121863674213 is a deficient number, since it is larger than the sum of its proper divisors (523020295).

121863674213 is an equidigital number, since it uses as much as digits as its factorization.

121863674213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523020294.

The product of its digits is 290304, while the sum is 44.

The spelling of 121863674213 in words is "one hundred twenty-one billion, eight hundred sixty-three million, six hundred seventy-four thousand, two hundred thirteen".