21120110243971 has 2 divisors, whose sum is σ = 21120110243972. Its totient is φ = 21120110243970.

The previous prime is 21120110243929. The next prime is 21120110244007. The reversal of 21120110243971 is 17934201102112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21120110243971 - 2³⁷ = 20982671290499 is a prime.

It is not a weakly prime, because it can be changed into another prime (21120110243171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560055121985 + 10560055121986.

It is an arithmetic number, because the mean of its divisors is an integer number (10560055121986).

Almost surely, 2^{21120110243971} is an apocalyptic number.

21120110243971 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120110243971 is an equidigital number, since it uses as much as digits as its factorization.

21120110243971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 34.

The spelling of 21120110243971 in words is "twenty-one trillion, one hundred twenty billion, one hundred ten million, two hundred forty-three thousand, nine hundred seventy-one".