42200434921 has 2 divisors, whose sum is σ = 42200434922. Its totient is φ = 42200434920.

The previous prime is 42200434901. The next prime is 42200434957. The reversal of 42200434921 is 12943400224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25343048025 + 16857386896 = 159195^2 + 129836^2 .

It is a cyclic number.

It is not a de Polignac number, because 42200434921 - 2²³ = 42192046313 is a prime.

It is not a weakly prime, because it can be changed into another prime (42200434901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21100217460 + 21100217461.

It is an arithmetic number, because the mean of its divisors is an integer number (21100217461).

Almost surely, 2^42200434921 is an apocalyptic number.

It is an amenable number.

42200434921 is a deficient number, since it is larger than the sum of its proper divisors (1).

42200434921 is an equidigital number, since it uses as much as digits as its factorization.

42200434921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 42200434921 in words is "forty-two billion, two hundred million, four hundred thirty-four thousand, nine hundred twenty-one".