21021101120263 has 2 divisors, whose sum is σ = 21021101120264. Its totient is φ = 21021101120262.

The previous prime is 21021101120183. The next prime is 21021101120381. The reversal of 21021101120263 is 36202110112012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21021101120263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21021101123263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510550560131 + 10510550560132.

It is an arithmetic number, because the mean of its divisors is an integer number (10510550560132).

Almost surely, 2^{21021101120263} is an apocalyptic number.

21021101120263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021101120263 is an equidigital number, since it uses as much as digits as its factorization.

21021101120263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21021101120263 its reverse (36202110112012), we get a palindrome (57223211232275).

The spelling of 21021101120263 in words is "twenty-one trillion, twenty-one billion, one hundred one million, one hundred twenty thousand, two hundred sixty-three".