20121100012 has 24 divisors (see below), whose sum is σ = 38295995472. Its totient is φ = 9194712000.

The previous prime is 20121100003. The next prime is 20121100079. The reversal of 20121100012 is 21000112102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1910314 + ... + 1920817.

It is an arithmetic number, because the mean of its divisors is an integer number (1595666478).

Almost surely, 2^20121100012 is an apocalyptic number.

It is an amenable number.

20121100012 is a deficient number, since it is larger than the sum of its proper divisors (18174895460).

20121100012 is a wasteful number, since it uses less digits than its factorization.

20121100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3831249 (or 3831247 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20121100012 its reverse (21000112102), we get a palindrome (41121212114).

The spelling of 20121100012 in words is "twenty billion, one hundred twenty-one million, one hundred thousand, twelve".