21101120110969 has 2 divisors, whose sum is σ = 21101120110970. Its totient is φ = 21101120110968.

The previous prime is 21101120110957. The next prime is 21101120111011. The reversal of 21101120110969 is 96901102110112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16920882250000 + 4180237860969 = 4113500^2 + 2044563^2 .

It is a cyclic number.

It is not a de Polignac number, because 21101120110969 - 2⁷ = 21101120110841 is a prime.

It is a super-2 number, since 2×21101120110969² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21101120110949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550560055484 + 10550560055485.

It is an arithmetic number, because the mean of its divisors is an integer number (10550560055485).

Almost surely, 2^{21101120110969} is an apocalyptic number.

It is an amenable number.

21101120110969 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101120110969 is an equidigital number, since it uses as much as digits as its factorization.

21101120110969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 34.

The spelling of 21101120110969 in words is "twenty-one trillion, one hundred one billion, one hundred twenty million, one hundred ten thousand, nine hundred sixty-nine".