20120120001281 has 2 divisors, whose sum is σ = 20120120001282. Its totient is φ = 20120120001280.

The previous prime is 20120120001277. The next prime is 20120120001353. The reversal of 20120120001281 is 18210002102102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15251407143025 + 4868712858256 = 3905305^2 + 2206516^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120120001281 - 2² = 20120120001277 is a prime.

It is a super-2 number, since 2×20120120001281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20120120001581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060060000640 + 10060060000641.

It is an arithmetic number, because the mean of its divisors is an integer number (10060060000641).

Almost surely, 2^{20120120001281} is an apocalyptic number.

It is an amenable number.

20120120001281 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120120001281 is an equidigital number, since it uses as much as digits as its factorization.

20120120001281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 20120120001281 its reverse (18210002102102), we get a palindrome (38330122103383).

The spelling of 20120120001281 in words is "twenty trillion, one hundred twenty billion, one hundred twenty million, one thousand, two hundred eighty-one".