20122120200997 has 2 divisors, whose sum is σ = 20122120200998. Its totient is φ = 20122120200996.

The previous prime is 20122120200977. The next prime is 20122120201033. The reversal of 20122120200997 is 79900202122102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18552928050721 + 1569192150276 = 4307311^2 + 1252674^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20122120200997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122120200967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061060100498 + 10061060100499.

It is an arithmetic number, because the mean of its divisors is an integer number (10061060100499).

Almost surely, 2^{20122120200997} is an apocalyptic number.

It is an amenable number.

20122120200997 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122120200997 is an equidigital number, since it uses as much as digits as its factorization.

20122120200997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 20122120200997 in words is "twenty trillion, one hundred twenty-two billion, one hundred twenty million, two hundred thousand, nine hundred ninety-seven".