21201211010983 has 2 divisors, whose sum is σ = 21201211010984. Its totient is φ = 21201211010982.

The previous prime is 21201211010981. The next prime is 21201211010989. The reversal of 21201211010983 is 38901011210212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21201211010983 - 2¹ = 21201211010981 is a prime.

Together with 21201211010981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21201211010981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600605505491 + 10600605505492.

It is an arithmetic number, because the mean of its divisors is an integer number (10600605505492).

Almost surely, 2^{21201211010983} is an apocalyptic number.

21201211010983 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201211010983 is an equidigital number, since it uses as much as digits as its factorization.

21201211010983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 31.

The spelling of 21201211010983 in words is "twenty-one trillion, two hundred one billion, two hundred eleven million, ten thousand, nine hundred eighty-three".