21112000133309 has 2 divisors, whose sum is σ = 21112000133310. Its totient is φ = 21112000133308.

The previous prime is 21112000133281. The next prime is 21112000133351. The reversal of 21112000133309 is 90333100021112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21110321592409 + 1678540900 = 4594597^2 + 40970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112000133309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112000133369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556000066654 + 10556000066655.

It is an arithmetic number, because the mean of its divisors is an integer number (10556000066655).

Almost surely, 2^{21112000133309} is an apocalyptic number.

It is an amenable number.

21112000133309 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112000133309 is an equidigital number, since it uses as much as digits as its factorization.

21112000133309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 21112000133309 in words is "twenty-one trillion, one hundred twelve billion, one hundred thirty-three thousand, three hundred nine".