20101111012 has 12 divisors (see below), whose sum is σ = 35179035696. Its totient is φ = 10049957960.

The previous prime is 20101111007. The next prime is 20101111031. The reversal of 20101111012 is 21011110102.

It is a self number, because there is not a number n which added to its sum of digits gives 20101111012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68878 + ... + 212005.

It is an arithmetic number, because the mean of its divisors is an integer number (2931586308).

Almost surely, 2^20101111012 is an apocalyptic number.

It is an amenable number.

20101111012 is a deficient number, since it is larger than the sum of its proper divisors (15077924684).

20101111012 is a wasteful number, since it uses less digits than its factorization.

20101111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298778 (or 298776 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20101111012 its reverse (21011110102), we get a palindrome (41112221114).

The spelling of 20101111012 in words is "twenty billion, one hundred one million, one hundred eleven thousand, twelve".