20120111002100 has 72 divisors (see below), whose sum is σ = 46880025611328. Its totient is φ = 7467945049600.

The previous prime is 20120111002091. The next prime is 20120111002129. The reversal of 20120111002100 is 120011102102.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 83226902 + ... + 83468301.

It is an arithmetic number, because the mean of its divisors is an integer number (651111466824).

Almost surely, 2^{20120111002100} is an apocalyptic number.

20120111002100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120111002100 is an abundant number, since it is smaller than the sum of its proper divisors (26759914609228).

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

20120111002100 is a wasteful number, since it uses less digits than its factorization.

20120111002100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166695305 (or 166695298 counting only the distinct ones).

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

Adding to 20120111002100 its reverse (120011102102), we get a palindrome (20240122104202).

The spelling of 20120111002100 in words is "twenty trillion, one hundred twenty billion, one hundred eleven million, two thousand, one hundred".