20121210123013 has 2 divisors, whose sum is σ = 20121210123014. Its totient is φ = 20121210123012.

The previous prime is 20121210122953. The next prime is 20121210123031. The reversal of 20121210123013 is 31032101212102.

Together with next prime (20121210123031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15348702378564 + 4772507744449 = 3917742^2 + 2184607^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121210123013 - 2¹³ = 20121210114821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121210123913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060605061506 + 10060605061507.

It is an arithmetic number, because the mean of its divisors is an integer number (10060605061507).

Almost surely, 2^{20121210123013} is an apocalyptic number.

It is an amenable number.

20121210123013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121210123013 is an equidigital number, since it uses as much as digits as its factorization.

20121210123013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20121210123013 its reverse (31032101212102), we get a palindrome (51153311335115).

The spelling of 20121210123013 in words is "twenty trillion, one hundred twenty-one billion, two hundred ten million, one hundred twenty-three thousand, thirteen".