121704044131 has 4 divisors (see below), whose sum is σ = 123766824600. Its totient is φ = 119641263664.

The previous prime is 121704044129. The next prime is 121704044149. The reversal of 121704044131 is 131440407121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131440407121 = 48817 ⋅2692513.

It is a cyclic number.

It is not a de Polignac number, because 121704044131 - 2¹ = 121704044129 is a prime.

It is a super-2 number, since 2×121704044131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121704044131.

It is not an unprimeable number, because it can be changed into a prime (121704045131) 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, 1031390146 + ... + 1031390263.

It is an arithmetic number, because the mean of its divisors is an integer number (30941706150).

Almost surely, 2^121704044131 is an apocalyptic number.

121704044131 is a deficient number, since it is larger than the sum of its proper divisors (2062780469).

121704044131 is an equidigital number, since it uses as much as digits as its factorization.

121704044131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062780468.

The product of its (nonzero) digits is 2688, while the sum is 28.

The spelling of 121704044131 in words is "one hundred twenty-one billion, seven hundred four million, forty-four thousand, one hundred thirty-one".