20110121021012 has 24 divisors (see below), whose sum is σ = 38395486920672. Its totient is φ = 9140145600800.

The previous prime is 20110121020993. The next prime is 20110121021017. The reversal of 20110121021012 is 21012012101102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110121021017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19965383 + ... + 20948430.

It is an arithmetic number, because the mean of its divisors is an integer number (1599811955028).

Almost surely, 2^{20110121021012} is an apocalyptic number.

20110121021012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20110121021012 is a deficient number, since it is larger than the sum of its proper divisors (18285365899660).

20110121021012 is a wasteful number, since it uses less digits than its factorization.

20110121021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40924999 (or 40924997 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20110121021012 its reverse (21012012101102), we get a palindrome (41122133122114).

The spelling of 20110121021012 in words is "twenty trillion, one hundred ten billion, one hundred twenty-one million, twenty-one thousand, twelve".