212120201758957 has 2 divisors, whose sum is σ = 212120201758958. Its totient is φ = 212120201758956.

The previous prime is 212120201758943. The next prime is 212120201758979. The reversal of 212120201758957 is 759857102021212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200015793577636 + 12104408181321 = 14142694^2 + 3479139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212120201758957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212120201758937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060100879478 + 106060100879479.

It is an arithmetic number, because the mean of its divisors is an integer number (106060100879479).

Almost surely, 2^{212120201758957} is an apocalyptic number.

It is an amenable number.

212120201758957 is a deficient number, since it is larger than the sum of its proper divisors (1).

212120201758957 is an equidigital number, since it uses as much as digits as its factorization.

212120201758957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1411200, while the sum is 52.

The spelling of 212120201758957 in words is "two hundred twelve trillion, one hundred twenty billion, two hundred one million, seven hundred fifty-eight thousand, nine hundred fifty-seven".