2111521541047 has 2 divisors, whose sum is σ = 2111521541048. Its totient is φ = 2111521541046.

The previous prime is 2111521541033. The next prime is 2111521541057. The reversal of 2111521541047 is 7401451251112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2111521541047 - 2¹⁵ = 2111521508279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111521541057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055760770523 + 1055760770524.

It is an arithmetic number, because the mean of its divisors is an integer number (1055760770524).

Almost surely, 2^{2111521541047} is an apocalyptic number.

2111521541047 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111521541047 is an equidigital number, since it uses as much as digits as its factorization.

2111521541047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11200, while the sum is 34.

Adding to 2111521541047 its reverse (7401451251112), we get a palindrome (9512972792159).

The spelling of 2111521541047 in words is "two trillion, one hundred eleven billion, five hundred twenty-one million, five hundred forty-one thousand, forty-seven".