20121013279 has 2 divisors, whose sum is σ = 20121013280. Its totient is φ = 20121013278.

The previous prime is 20121013273. The next prime is 20121013313. The reversal of 20121013279 is 97231012102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20121013279 - 2¹¹ = 20121011231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121013273) 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 as a sum of consecutive naturals, namely, 10060506639 + 10060506640.

It is an arithmetic number, because the mean of its divisors is an integer number (10060506640).

Almost surely, 2^20121013279 is an apocalyptic number.

20121013279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121013279 is an equidigital number, since it uses as much as digits as its factorization.

20121013279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The spelling of 20121013279 in words is "twenty billion, one hundred twenty-one million, thirteen thousand, two hundred seventy-nine".