20121201982 has 8 divisors (see below), whose sum is σ = 34493489136. Its totient is φ = 8623372272.

The previous prime is 20121201929. The next prime is 20121201983. The reversal of 20121201982 is 28910212102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20121201982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121201983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 718614343 + ... + 718614370.

It is an arithmetic number, because the mean of its divisors is an integer number (4311686142).

Almost surely, 2^20121201982 is an apocalyptic number.

20121201982 is a deficient number, since it is larger than the sum of its proper divisors (14372287154).

20121201982 is a wasteful number, since it uses less digits than its factorization.

20121201982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437228722.

The product of its (nonzero) digits is 1152, while the sum is 28.

It can be divided in two parts, 2012120 and 1982, that added together give a palindrome (2014102).

The spelling of 20121201982 in words is "twenty billion, one hundred twenty-one million, two hundred one thousand, nine hundred eighty-two".