43102111420021 has 2 divisors, whose sum is σ = 43102111420022. Its totient is φ = 43102111420020.

The previous prime is 43102111420009. The next prime is 43102111420033. The reversal of 43102111420021 is 12002411120134.

It is a balanced prime because it is at equal distance from previous prime (43102111420009) and next prime (43102111420033).

It can be written as a sum of positive squares in only one way, i.e., 26236625508900 + 16865485911121 = 5122170^2 + 4106761^2 .

It is a cyclic number.

It is not a de Polignac number, because 43102111420021 - 2²¹ = 43102109322869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43102111419974 and 43102111420001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43102111490021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21551055710010 + 21551055710011.

It is an arithmetic number, because the mean of its divisors is an integer number (21551055710011).

Almost surely, 2^{43102111420021} is an apocalyptic number.

It is an amenable number.

43102111420021 is a deficient number, since it is larger than the sum of its proper divisors (1).

43102111420021 is an equidigital number, since it uses as much as digits as its factorization.

43102111420021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 43102111420021 its reverse (12002411120134), we get a palindrome (55104522540155).

The spelling of 43102111420021 in words is "forty-three trillion, one hundred two billion, one hundred eleven million, four hundred twenty thousand, twenty-one".