212001200009957 has 2 divisors, whose sum is σ = 212001200009958. Its totient is φ = 212001200009956.

The previous prime is 212001200009923. The next prime is 212001200010013. The reversal of 212001200009957 is 759900002100212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197395587460516 + 14605612549441 = 14049754^2 + 3821729^2 .

It is a cyclic number.

It is not a de Polignac number, because 212001200009957 - 2²² = 212001195815653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212001200009957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212001200009657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106000600004978 + 106000600004979.

It is an arithmetic number, because the mean of its divisors is an integer number (106000600004979).

Almost surely, 2^{212001200009957} is an apocalyptic number.

It is an amenable number.

212001200009957 is a deficient number, since it is larger than the sum of its proper divisors (1).

212001200009957 is an equidigital number, since it uses as much as digits as its factorization.

212001200009957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 38.

The spelling of 212001200009957 in words is "two hundred twelve trillion, one billion, two hundred million, nine thousand, nine hundred fifty-seven".