20011112137 has 2 divisors, whose sum is σ = 20011112138. Its totient is φ = 20011112136.

The previous prime is 20011112089. The next prime is 20011112207. The reversal of 20011112137 is 73121111002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18157293001 + 1853819136 = 134749^2 + 43056^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011112137 - 2¹⁵ = 20011079369 is a prime.

It is a super-3 number, since 3×20011112137³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20011122137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005556068 + 10005556069.

It is an arithmetic number, because the mean of its divisors is an integer number (10005556069).

Almost surely, 2^20011112137 is an apocalyptic number.

It is an amenable number.

20011112137 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011112137 is an equidigital number, since it uses as much as digits as its factorization.

20011112137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 19.

Adding to 20011112137 its reverse (73121111002), we get a palindrome (93132223139).

The spelling of 20011112137 in words is "twenty billion, eleven million, one hundred twelve thousand, one hundred thirty-seven".