21101220083 has 2 divisors, whose sum is σ = 21101220084. Its totient is φ = 21101220082.

The previous prime is 21101220043. The next prime is 21101220103. The reversal of 21101220083 is 38002210112.

It is an a-pointer prime, because the next prime (21101220103) can be obtained adding 21101220083 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21101220083 - 2¹⁰ = 21101219059 is a prime.

It is a super-2 number, since 2×21101220083² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21101220043) 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, 10550610041 + 10550610042.

It is an arithmetic number, because the mean of its divisors is an integer number (10550610042).

Almost surely, 2^21101220083 is an apocalyptic number.

21101220083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101220083 is an equidigital number, since it uses as much as digits as its factorization.

21101220083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21101220083 its reverse (38002210112), we get a palindrome (59103430195).

The spelling of 21101220083 in words is "twenty-one billion, one hundred one million, two hundred twenty thousand, eighty-three".