20121201983 has 2 divisors, whose sum is σ = 20121201984. Its totient is φ = 20121201982.

The previous prime is 20121201929. The next prime is 20121202001. The reversal of 20121201983 is 38910212102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121201983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121201923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060600991 + 10060600992.

It is an arithmetic number, because the mean of its divisors is an integer number (10060600992).

Almost surely, 2^20121201983 is an apocalyptic number.

20121201983 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121201983 is an equidigital number, since it uses as much as digits as its factorization.

20121201983 is an evil number, because the sum of its binary digits is even.

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

It can be divided in two parts, 201212019 and 83, that added together give a palindrome (201212102).

The spelling of 20121201983 in words is "twenty billion, one hundred twenty-one million, two hundred one thousand, nine hundred eighty-three".