20111210012 has 12 divisors (see below), whose sum is σ = 35206484376. Its totient is φ = 10052214480.

The previous prime is 20111209973. The next prime is 20111210017. The reversal of 20111210012 is 21001211102.

It is a junction number, because it is equal to n+sod(n) for n = 20111209975 and 20111210002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111210017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834263 + ... + 858030.

It is an arithmetic number, because the mean of its divisors is an integer number (2933873698).

Almost surely, 2^20111210012 is an apocalyptic number.

It is an amenable number.

20111210012 is a deficient number, since it is larger than the sum of its proper divisors (15095274364).

20111210012 is a wasteful number, since it uses less digits than its factorization.

20111210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695268 (or 1695266 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20111210012 its reverse (21001211102), we get a palindrome (41112421114).

The spelling of 20111210012 in words is "twenty billion, one hundred eleven million, two hundred ten thousand, twelve".