20212331202997 has 2 divisors, whose sum is σ = 20212331202998. Its totient is φ = 20212331202996.

The previous prime is 20212331202979. The next prime is 20212331203027. The reversal of 20212331202997 is 79920213321202.

Together with previous prime (20212331202979) 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., 14215508959716 + 5996822243281 = 3770346^2 + 2448841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20212331202997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212331203997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106165601498 + 10106165601499.

It is an arithmetic number, because the mean of its divisors is an integer number (10106165601499).

Almost surely, 2^{20212331202997} is an apocalyptic number.

It is an amenable number.

20212331202997 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212331202997 is an equidigital number, since it uses as much as digits as its factorization.

20212331202997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 20212331202997 in words is "twenty trillion, two hundred twelve billion, three hundred thirty-one million, two hundred two thousand, nine hundred ninety-seven".