20012112061 has 2 divisors, whose sum is σ = 20012112062. Its totient is φ = 20012112060.

The previous prime is 20012112059. The next prime is 20012112089. The reversal of 20012112061 is 16021121002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10963346436 + 9048765625 = 104706^2 + 95125^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012112061 - 2¹ = 20012112059 is a prime.

Together with 20012112059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012112661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006056030 + 10006056031.

It is an arithmetic number, because the mean of its divisors is an integer number (10006056031).

Almost surely, 2^20012112061 is an apocalyptic number.

It is an amenable number.

20012112061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012112061 is an equidigital number, since it uses as much as digits as its factorization.

20012112061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20012112061 its reverse (16021121002), we get a palindrome (36033233063).

The spelling of 20012112061 in words is "twenty billion, twelve million, one hundred twelve thousand, sixty-one".