212011010121997 has 2 divisors, whose sum is σ = 212011010121998. Its totient is φ = 212011010121996.

The previous prime is 212011010121983. The next prime is 212011010122013. The reversal of 212011010121997 is 799121010110212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198890829413956 + 13120180708041 = 14102866^2 + 3622179^2 .

It is a cyclic number.

It is not a de Polignac number, because 212011010121997 - 2²³ = 212011001733389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212011010125997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005505060998 + 106005505060999.

It is an arithmetic number, because the mean of its divisors is an integer number (106005505060999).

Almost surely, 2^{212011010121997} is an apocalyptic number.

It is an amenable number.

212011010121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

212011010121997 is an equidigital number, since it uses as much as digits as its factorization.

212011010121997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 37.

The spelling of 212011010121997 in words is "two hundred twelve trillion, eleven billion, ten million, one hundred twenty-one thousand, nine hundred ninety-seven".