201200120209981 has 2 divisors, whose sum is σ = 201200120209982. Its totient is φ = 201200120209980.

The previous prime is 201200120209967. The next prime is 201200120210029. The reversal of 201200120209981 is 189902021002102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176231200544100 + 24968919665881 = 13275210^2 + 4996891^2 .

It is a cyclic number.

It is not a de Polignac number, because 201200120209981 - 2⁷ = 201200120209853 is a prime.

It is a super-2 number, since 2×201200120209981² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201200120209981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201200120209381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100600060104990 + 100600060104991.

It is an arithmetic number, because the mean of its divisors is an integer number (100600060104991).

Almost surely, 2^{201200120209981} is an apocalyptic number.

It is an amenable number.

201200120209981 is a deficient number, since it is larger than the sum of its proper divisors (1).

201200120209981 is an equidigital number, since it uses as much as digits as its factorization.

201200120209981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 201200120209981 in words is "two hundred one trillion, two hundred billion, one hundred twenty million, two hundred nine thousand, nine hundred eighty-one".