21011210963 has 2 divisors, whose sum is σ = 21011210964. Its totient is φ = 21011210962.

The previous prime is 21011210951. The next prime is 21011211017. The reversal of 21011210963 is 36901211012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21011210963 - 2¹⁰ = 21011209939 is a prime.

It is a super-2 number, since 2×21011210963² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21011210063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505605481 + 10505605482.

It is an arithmetic number, because the mean of its divisors is an integer number (10505605482).

Almost surely, 2^21011210963 is an apocalyptic number.

21011210963 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011210963 is an equidigital number, since it uses as much as digits as its factorization.

21011210963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

Adding to 21011210963 its reverse (36901211012), we get a palindrome (57912421975).

The spelling of 21011210963 in words is "twenty-one billion, eleven million, two hundred ten thousand, nine hundred sixty-three".