201121122101987 has 2 divisors, whose sum is σ = 201121122101988. Its totient is φ = 201121122101986.

The previous prime is 201121122101971. The next prime is 201121122102053. The reversal of 201121122101987 is 789101221121102.

201121122101987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201121122101987 - 2⁴ = 201121122101971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201121122101987.

It is not a weakly prime, because it can be changed into another prime (201121122101957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560561050993 + 100560561050994.

It is an arithmetic number, because the mean of its divisors is an integer number (100560561050994).

Almost surely, 2^{201121122101987} is an apocalyptic number.

201121122101987 is a deficient number, since it is larger than the sum of its proper divisors (1).

201121122101987 is an equidigital number, since it uses as much as digits as its factorization.

201121122101987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 38.

The spelling of 201121122101987 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred one thousand, nine hundred eighty-seven".