20121210983 has 4 divisors (see below), whose sum is σ = 20121735408. Its totient is φ = 20120686560.

The previous prime is 20121210859. The next prime is 20121211001. The reversal of 20121210983 is 38901212102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20121210983 - 2¹⁸ = 20120948839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121218983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199691 + ... + 283052.

It is an arithmetic number, because the mean of its divisors is an integer number (5030433852).

Almost surely, 2^20121210983 is an apocalyptic number.

20121210983 is a deficient number, since it is larger than the sum of its proper divisors (524425).

20121210983 is an equidigital number, since it uses as much as digits as its factorization.

20121210983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524424.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 20121210983 in words is "twenty billion, one hundred twenty-one million, two hundred ten thousand, nine hundred eighty-three".