20121220120237 has 2 divisors, whose sum is σ = 20121220120238. Its totient is φ = 20121220120236.

The previous prime is 20121220120193. The next prime is 20121220120307. The reversal of 20121220120237 is 73202102212102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17614859364036 + 2506360756201 = 4197006^2 + 1583149^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121220120237 - 2³⁵ = 20086860381869 is a prime.

It is a super-4 number, since 4×20121220120237⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121220121237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060610060118 + 10060610060119.

It is an arithmetic number, because the mean of its divisors is an integer number (10060610060119).

Almost surely, 2^{20121220120237} is an apocalyptic number.

It is an amenable number.

20121220120237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121220120237 is an equidigital number, since it uses as much as digits as its factorization.

20121220120237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 20121220120237 its reverse (73202102212102), we get a palindrome (93323322332339).

The spelling of 20121220120237 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand, two hundred thirty-seven".