20011122012 has 48 divisors (see below), whose sum is σ = 56171575040. Its totient is φ = 5416543872.

The previous prime is 20011122011. The next prime is 20011122029. The reversal of 20011122012 is 21022111002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011122011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6267553 + ... + 6270744.

Almost surely, 2^20011122012 is an apocalyptic number.

It is an amenable number.

20011122012 is an abundant number, since it is smaller than the sum of its proper divisors (36160453028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20011122012 is a wasteful number, since it uses less digits than its factorization.

20011122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12538330 (or 12538328 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20011122012 its reverse (21022111002), we get a palindrome (41033233014).

The spelling of 20011122012 in words is "twenty billion, eleven million, one hundred twenty-two thousand, twelve".