21011101283 has 2 divisors, whose sum is σ = 21011101284. Its totient is φ = 21011101282.

The previous prime is 21011101277. The next prime is 21011101333. The reversal of 21011101283 is 38210111012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21011101283 - 2¹⁰ = 21011100259 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21011101883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505550641 + 10505550642.

It is an arithmetic number, because the mean of its divisors is an integer number (10505550642).

Almost surely, 2^21011101283 is an apocalyptic number.

21011101283 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011101283 is an equidigital number, since it uses as much as digits as its factorization.

21011101283 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 21011101283 its reverse (38210111012), we get a palindrome (59221212295).

The spelling of 21011101283 in words is "twenty-one billion, eleven million, one hundred one thousand, two hundred eighty-three".