20121011201100 has 144 divisors (see below), whose sum is σ = 60171781759488. Its totient is φ = 5188170543360.

The previous prime is 20121011201087. The next prime is 20121011201141. The reversal of 20121011201100 is 110211012102.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7426219 + ... + 9766818.

It is an arithmetic number, because the mean of its divisors is an integer number (417859595552).

Almost surely, 2^{20121011201100} is an apocalyptic number.

20121011201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121011201100 is an abundant number, since it is smaller than the sum of its proper divisors (40050770558388).

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

20121011201100 is a wasteful number, since it uses less digits than its factorization.

20121011201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17193184 (or 17193177 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20121011201100 its reverse (110211012102), we get a palindrome (20231222213202).

The spelling of 20121011201100 in words is "twenty trillion, one hundred twenty-one billion, eleven million, two hundred one thousand, one hundred".