21101142001 has 2 divisors, whose sum is σ = 21101142002. Its totient is φ = 21101142000.

The previous prime is 21101141951. The next prime is 21101142053. The reversal of 21101142001 is 10024110112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12276418401 + 8824723600 = 110799^2 + 93940^2 .

It is a cyclic number.

It is not a de Polignac number, because 21101142001 - 2¹¹ = 21101139953 is a prime.

It is not a weakly prime, because it can be changed into another prime (21101143001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550571000 + 10550571001.

It is an arithmetic number, because the mean of its divisors is an integer number (10550571001).

Almost surely, 2^21101142001 is an apocalyptic number.

It is an amenable number.

21101142001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101142001 is an equidigital number, since it uses as much as digits as its factorization.

21101142001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21101142001 its reverse (10024110112), we get a palindrome (31125252113).

The spelling of 21101142001 in words is "twenty-one billion, one hundred one million, one hundred forty-two thousand, one".