2011012101997 has 2 divisors, whose sum is σ = 2011012101998. Its totient is φ = 2011012101996.

The previous prime is 2011012101991. The next prime is 2011012102031. The reversal of 2011012101997 is 7991012101102.

It is an a-pointer prime, because the next prime (2011012102031) can be obtained adding 2011012101997 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1347872238441 + 663139863556 = 1160979^2 + 814334^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011012101997 - 2¹⁵ = 2011012069229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011012101991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005506050998 + 1005506050999.

It is an arithmetic number, because the mean of its divisors is an integer number (1005506050999).

Almost surely, 2^{2011012101997} is an apocalyptic number.

It is an amenable number.

2011012101997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011012101997 is an equidigital number, since it uses as much as digits as its factorization.

2011012101997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 34.

The spelling of 2011012101997 in words is "two trillion, eleven billion, twelve million, one hundred one thousand, nine hundred ninety-seven".