20113211020061 has 2 divisors, whose sum is σ = 20113211020062. Its totient is φ = 20113211020060.

The previous prime is 20113211020033. The next prime is 20113211020099. The reversal of 20113211020061 is 16002011231102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17056850440036 + 3056360580025 = 4129994^2 + 1748245^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113211020061 - 2²² = 20113206825757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20113211020361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056605510030 + 10056605510031.

It is an arithmetic number, because the mean of its divisors is an integer number (10056605510031).

Almost surely, 2^{20113211020061} is an apocalyptic number.

It is an amenable number.

20113211020061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113211020061 is an equidigital number, since it uses as much as digits as its factorization.

20113211020061 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 20.

Adding to 20113211020061 its reverse (16002011231102), we get a palindrome (36115222251163).

The spelling of 20113211020061 in words is "twenty trillion, one hundred thirteen billion, two hundred eleven million, twenty thousand, sixty-one".