21430121743 has 2 divisors, whose sum is σ = 21430121744. Its totient is φ = 21430121742.

The previous prime is 21430121737. The next prime is 21430121753. The reversal of 21430121743 is 34712103412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21430121743 - 2²⁹ = 20893250831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21430121753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715060871 + 10715060872.

It is an arithmetic number, because the mean of its divisors is an integer number (10715060872).

Almost surely, 2^21430121743 is an apocalyptic number.

21430121743 is a deficient number, since it is larger than the sum of its proper divisors (1).

21430121743 is an equidigital number, since it uses as much as digits as its factorization.

21430121743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The spelling of 21430121743 in words is "twenty-one billion, four hundred thirty million, one hundred twenty-one thousand, seven hundred forty-three".