20011201212061 has 2 divisors, whose sum is σ = 20011201212062. Its totient is φ = 20011201212060.

The previous prime is 20011201212049. The next prime is 20011201212077. The reversal of 20011201212061 is 16021210211002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10302212606436 + 9708988605625 = 3209706^2 + 3115925^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011201212061 - 2⁵ = 20011201212029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011201212661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005600606030 + 10005600606031.

It is an arithmetic number, because the mean of its divisors is an integer number (10005600606031).

Almost surely, 2^{20011201212061} is an apocalyptic number.

It is an amenable number.

20011201212061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011201212061 is an equidigital number, since it uses as much as digits as its factorization.

20011201212061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 20011201212061 its reverse (16021210211002), we get a palindrome (36032411423063).

The spelling of 20011201212061 in words is "twenty trillion, eleven billion, two hundred one million, two hundred twelve thousand, sixty-one".