21112030969 has 2 divisors, whose sum is σ = 21112030970. Its totient is φ = 21112030968.

The previous prime is 21112030963. The next prime is 21112030981. The reversal of 21112030969 is 96903021112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20874470400 + 237560569 = 144480^2 + 15413^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112030969 - 2¹³ = 21112022777 is a prime.

It is a super-2 number, since 2×21112030969² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21112030963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556015484 + 10556015485.

It is an arithmetic number, because the mean of its divisors is an integer number (10556015485).

Almost surely, 2^21112030969 is an apocalyptic number.

It is an amenable number.

21112030969 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112030969 is an equidigital number, since it uses as much as digits as its factorization.

21112030969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 34.

The spelling of 21112030969 in words is "twenty-one billion, one hundred twelve million, thirty thousand, nine hundred sixty-nine".