21012101210963 has 2 divisors, whose sum is σ = 21012101210964. Its totient is φ = 21012101210962.

The previous prime is 21012101210923. The next prime is 21012101211007. The reversal of 21012101210963 is 36901210121012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21012101210963 - 2²⁰ = 21012100162387 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (21012101210923) 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, 10506050605481 + 10506050605482.

It is an arithmetic number, because the mean of its divisors is an integer number (10506050605482).

Almost surely, 2^{21012101210963} is an apocalyptic number.

21012101210963 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012101210963 is an equidigital number, since it uses as much as digits as its factorization.

21012101210963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

Adding to 21012101210963 its reverse (36901210121012), we get a palindrome (57913311331975).

The spelling of 21012101210963 in words is "twenty-one trillion, twelve billion, one hundred one million, two hundred ten thousand, nine hundred sixty-three".