20011201031113 has 2 divisors, whose sum is σ = 20011201031114. Its totient is φ = 20011201031112.

The previous prime is 20011201031111. The next prime is 20011201031131. The reversal of 20011201031113 is 31113010211002.

It is a happy number.

Together with next prime (20011201031131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17408696451129 + 2602504579984 = 4172373^2 + 1613228^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011201031113 - 2¹ = 20011201031111 is a prime.

Together with 20011201031111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20011201031111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005600515556 + 10005600515557.

It is an arithmetic number, because the mean of its divisors is an integer number (10005600515557).

Almost surely, 2^{20011201031113} is an apocalyptic number.

It is an amenable number.

20011201031113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011201031113 is an equidigital number, since it uses as much as digits as its factorization.

20011201031113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 20011201031113 its reverse (31113010211002), we get a palindrome (51124211242115).

The spelling of 20011201031113 in words is "twenty trillion, eleven billion, two hundred one million, thirty-one thousand, one hundred thirteen".