21442101203203 has 2 divisors, whose sum is σ = 21442101203204. Its totient is φ = 21442101203202.

The previous prime is 21442101203183. The next prime is 21442101203231. The reversal of 21442101203203 is 30230210124412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21442101203203 is a prime.

It is not a weakly prime, because it can be changed into another prime (21442101203233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721050601601 + 10721050601602.

It is an arithmetic number, because the mean of its divisors is an integer number (10721050601602).

Almost surely, 2^{21442101203203} is an apocalyptic number.

21442101203203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442101203203 is an equidigital number, since it uses as much as digits as its factorization.

21442101203203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21442101203203 its reverse (30230210124412), we get a palindrome (51672311327615).

The spelling of 21442101203203 in words is "twenty-one trillion, four hundred forty-two billion, one hundred one million, two hundred three thousand, two hundred three".