200101261991 has 2 divisors, whose sum is σ = 200101261992. Its totient is φ = 200101261990.

The previous prime is 200101261981. The next prime is 200101261999. The reversal of 200101261991 is 199162101002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 200101261991 - 2¹⁴ = 200101245607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200101261999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100050630995 + 100050630996.

It is an arithmetic number, because the mean of its divisors is an integer number (100050630996).

Almost surely, 2^200101261991 is an apocalyptic number.

200101261991 is a deficient number, since it is larger than the sum of its proper divisors (1).

200101261991 is an equidigital number, since it uses as much as digits as its factorization.

200101261991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 32.

Adding to 200101261991 its reverse (199162101002), we get a palindrome (399263362993).

The spelling of 200101261991 in words is "two hundred billion, one hundred one million, two hundred sixty-one thousand, nine hundred ninety-one".