20121200101012 has 24 divisors (see below), whose sum is σ = 35344820974176. Its totient is φ = 10022691337248.

The previous prime is 20121200101007. The next prime is 20121200101019. The reversal of 20121200101012 is 21010100212102.

It is a junction number, because it is equal to n+sod(n) for n = 20121200100983 and 20121200101001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121200101019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5569863 + ... + 8441905.

It is an arithmetic number, because the mean of its divisors is an integer number (1472700873924).

Almost surely, 2^{20121200101012} is an apocalyptic number.

It is an amenable number.

20121200101012 is a deficient number, since it is larger than the sum of its proper divisors (15223620873164).

20121200101012 is a wasteful number, since it uses less digits than its factorization.

20121200101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878647 (or 2878645 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20121200101012 its reverse (21010100212102), we get a palindrome (41131300313114).

The spelling of 20121200101012 in words is "twenty trillion, one hundred twenty-one billion, two hundred million, one hundred one thousand, twelve".