21211101083 has 2 divisors, whose sum is σ = 21211101084. Its totient is φ = 21211101082.

The previous prime is 21211101029. The next prime is 21211101097. The reversal of 21211101083 is 38010111212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21211101083 is a prime.

It is not a weakly prime, because it can be changed into another prime (21211100083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605550541 + 10605550542.

It is an arithmetic number, because the mean of its divisors is an integer number (10605550542).

Almost surely, 2^21211101083 is an apocalyptic number.

21211101083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211101083 is an equidigital number, since it uses as much as digits as its factorization.

21211101083 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 21211101083 its reverse (38010111212), we get a palindrome (59221212295).

The spelling of 21211101083 in words is "twenty-one billion, two hundred eleven million, one hundred one thousand, eighty-three".