201881699281 has 2 divisors, whose sum is σ = 201881699282. Its totient is φ = 201881699280.

The previous prime is 201881699273. The next prime is 201881699293. The reversal of 201881699281 is 182996188102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170123251600 + 31758447681 = 412460^2 + 178209^2 .

It is a cyclic number.

It is not a de Polignac number, because 201881699281 - 2³ = 201881699273 is a prime.

It is a super-2 number, since 2×201881699281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201881619281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100940849640 + 100940849641.

It is an arithmetic number, because the mean of its divisors is an integer number (100940849641).

Almost surely, 2^201881699281 is an apocalyptic number.

It is an amenable number.

201881699281 is a deficient number, since it is larger than the sum of its proper divisors (1).

201881699281 is an equidigital number, since it uses as much as digits as its factorization.

201881699281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 55.

The spelling of 201881699281 in words is "two hundred one billion, eight hundred eighty-one million, six hundred ninety-nine thousand, two hundred eighty-one".