21020222220983 has 2 divisors, whose sum is σ = 21020222220984. Its totient is φ = 21020222220982.

The previous prime is 21020222220979. The next prime is 21020222221007. The reversal of 21020222220983 is 38902222202012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21020222220983 - 2² = 21020222220979 is a prime.

It is a super-3 number, since 3×21020222220983³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020222250983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510111110491 + 10510111110492.

It is an arithmetic number, because the mean of its divisors is an integer number (10510111110492).

Almost surely, 2^{21020222220983} is an apocalyptic number.

21020222220983 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020222220983 is an equidigital number, since it uses as much as digits as its factorization.

21020222220983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

Adding to 21020222220983 its reverse (38902222202012), we get a palindrome (59922444422995).

The spelling of 21020222220983 in words is "twenty-one trillion, twenty billion, two hundred twenty-two million, two hundred twenty thousand, nine hundred eighty-three".