21101130244147 has 2 divisors, whose sum is σ = 21101130244148. Its totient is φ = 21101130244146.

The previous prime is 21101130244121. The next prime is 21101130244169. The reversal of 21101130244147 is 74144203110112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21101130244147 is a prime.

It is not a weakly prime, because it can be changed into another prime (21101130244547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550565122073 + 10550565122074.

It is an arithmetic number, because the mean of its divisors is an integer number (10550565122074).

Almost surely, 2^{21101130244147} is an apocalyptic number.

21101130244147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101130244147 is an equidigital number, since it uses as much as digits as its factorization.

21101130244147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

Adding to 21101130244147 its reverse (74144203110112), we get a palindrome (95245333354259).

The spelling of 21101130244147 in words is "twenty-one trillion, one hundred one billion, one hundred thirty million, two hundred forty-four thousand, one hundred forty-seven".