20110122012 has 24 divisors (see below), whose sum is σ = 46951316496. Its totient is φ = 6699417088.

The previous prime is 20110121971. The next prime is 20110122017. The reversal of 20110122012 is 21022101102.

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 (20110122017) 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, 473403 + ... + 514130.

It is an arithmetic number, because the mean of its divisors is an integer number (1956304854).

Almost surely, 2^20110122012 is an apocalyptic number.

It is an amenable number.

20110122012 is an abundant number, since it is smaller than the sum of its proper divisors (26841194484).

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

20110122012 is a wasteful number, since it uses less digits than its factorization.

20110122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989237 (or 989235 counting only the distinct ones).

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

Adding to 20110122012 its reverse (21022101102), we get a palindrome (41132223114).

The spelling of 20110122012 in words is "twenty billion, one hundred ten million, one hundred twenty-two thousand, twelve".