2101100021047 has 2 divisors, whose sum is σ = 2101100021048. Its totient is φ = 2101100021046.

The previous prime is 2101100020997. The next prime is 2101100021087. The reversal of 2101100021047 is 7401200011012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2101100021047 - 2³¹ = 2098952537399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101100021087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050550010523 + 1050550010524.

It is an arithmetic number, because the mean of its divisors is an integer number (1050550010524).

Almost surely, 2^{2101100021047} is an apocalyptic number.

2101100021047 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101100021047 is an equidigital number, since it uses as much as digits as its factorization.

2101100021047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 2101100021047 its reverse (7401200011012), we get a palindrome (9502300032059).

The spelling of 2101100021047 in words is "two trillion, one hundred one billion, one hundred million, twenty-one thousand, forty-seven".