2121317272479 has 4 divisors (see below), whose sum is σ = 2828423029976. Its totient is φ = 1414211514984.

The previous prime is 2121317272447. The next prime is 2121317272483. The reversal of 2121317272479 is 9742727131212.

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

It is not a de Polignac number, because 2121317272479 - 2⁵ = 2121317272447 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 (2121317273479) 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, 353552878744 + ... + 353552878749.

It is an arithmetic number, because the mean of its divisors is an integer number (707105757494).

Almost surely, 2^{2121317272479} is an apocalyptic number.

2121317272479 is a deficient number, since it is larger than the sum of its proper divisors (707105757497).

2121317272479 is an equidigital number, since it uses as much as digits as its factorization.

2121317272479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707105757496.

The product of its digits is 592704, while the sum is 48.

The spelling of 2121317272479 in words is "two trillion, one hundred twenty-one billion, three hundred seventeen million, two hundred seventy-two thousand, four hundred seventy-nine".