201211201201993 has 2 divisors, whose sum is σ = 201211201201994. Its totient is φ = 201211201201992.

The previous prime is 201211201201981. The next prime is 201211201202047. The reversal of 201211201201993 is 399102102112102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145191245518089 + 56019955683904 = 12049533^2 + 7484648^2 .

It is a cyclic number.

It is not a de Polignac number, because 201211201201993 - 2⁵ = 201211201201961 is a prime.

It is not a weakly prime, because it can be changed into another prime (201211201201393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605600600996 + 100605600600997.

It is an arithmetic number, because the mean of its divisors is an integer number (100605600600997).

Almost surely, 2^{201211201201993} is an apocalyptic number.

It is an amenable number.

201211201201993 is a deficient number, since it is larger than the sum of its proper divisors (1).

201211201201993 is an equidigital number, since it uses as much as digits as its factorization.

201211201201993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 201211201201993 in words is "two hundred one trillion, two hundred eleven billion, two hundred one million, two hundred one thousand, nine hundred ninety-three".