201052120991 has 2 divisors, whose sum is σ = 201052120992. Its totient is φ = 201052120990.

The previous prime is 201052120979. The next prime is 201052121099. The reversal of 201052120991 is 199021250102.

Together with next prime (201052121099) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201052120991 - 2¹⁴ = 201052104607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201052122991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100526060495 + 100526060496.

It is an arithmetic number, because the mean of its divisors is an integer number (100526060496).

Almost surely, 2^201052120991 is an apocalyptic number.

201052120991 is a deficient number, since it is larger than the sum of its proper divisors (1).

201052120991 is an equidigital number, since it uses as much as digits as its factorization.

201052120991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 32.

The spelling of 201052120991 in words is "two hundred one billion, fifty-two million, one hundred twenty thousand, nine hundred ninety-one".