21435106001 has 2 divisors, whose sum is σ = 21435106002. Its totient is φ = 21435106000.

The previous prime is 21435105977. The next prime is 21435106009. The reversal of 21435106001 is 10060153412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16044022225 + 5391083776 = 126665^2 + 73424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21435106001 is a prime.

It is not a weakly prime, because it can be changed into another prime (21435106009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10717553000 + 10717553001.

It is an arithmetic number, because the mean of its divisors is an integer number (10717553001).

Almost surely, 2^21435106001 is an apocalyptic number.

It is an amenable number.

21435106001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21435106001 is an equidigital number, since it uses as much as digits as its factorization.

21435106001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 21435106001 its reverse (10060153412), we get a palindrome (31495259413).

The spelling of 21435106001 in words is "twenty-one billion, four hundred thirty-five million, one hundred six thousand, one".