20121120361 has 2 divisors, whose sum is σ = 20121120362. Its totient is φ = 20121120360.

The previous prime is 20121120317. The next prime is 20121120377. The reversal of 20121120361 is 16302112102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14304160000 + 5816960361 = 119600^2 + 76269^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121120361 - 2¹⁷ = 20120989289 is a prime.

It is not a weakly prime, because it can be changed into another prime (20121120301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060560180 + 10060560181.

It is an arithmetic number, because the mean of its divisors is an integer number (10060560181).

Almost surely, 2^20121120361 is an apocalyptic number.

It is an amenable number.

20121120361 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121120361 is an equidigital number, since it uses as much as digits as its factorization.

20121120361 is an evil number, because the sum of its binary digits is even.

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

Adding to 20121120361 its reverse (16302112102), we get a palindrome (36423232463).

The spelling of 20121120361 in words is "twenty billion, one hundred twenty-one million, one hundred twenty thousand, three hundred sixty-one".