21212130983 has 2 divisors, whose sum is σ = 21212130984. Its totient is φ = 21212130982.

The previous prime is 21212130967. The next prime is 21212131019. The reversal of 21212130983 is 38903121212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21212130983 - 2⁴ = 21212130967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212130943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606065491 + 10606065492.

It is an arithmetic number, because the mean of its divisors is an integer number (10606065492).

Almost surely, 2^21212130983 is an apocalyptic number.

21212130983 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212130983 is an equidigital number, since it uses as much as digits as its factorization.

21212130983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 21212130983 in words is "twenty-one billion, two hundred twelve million, one hundred thirty thousand, nine hundred eighty-three".