20111201137 has 2 divisors, whose sum is σ = 20111201138. Its totient is φ = 20111201136.

The previous prime is 20111201129. The next prime is 20111201153. The reversal of 20111201137 is 73110211102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10086385761 + 10024815376 = 100431^2 + 100124^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111201137 - 2³ = 20111201129 is a prime.

It is a super-2 number, since 2×20111201137² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20111201107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055600568 + 10055600569.

It is an arithmetic number, because the mean of its divisors is an integer number (10055600569).

Almost surely, 2^20111201137 is an apocalyptic number.

It is an amenable number.

20111201137 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111201137 is an equidigital number, since it uses as much as digits as its factorization.

20111201137 is an evil number, because the sum of its binary digits is even.

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

Adding to 20111201137 its reverse (73110211102), we get a palindrome (93221412239).

The spelling of 20111201137 in words is "twenty billion, one hundred eleven million, two hundred one thousand, one hundred thirty-seven".