20103211211100 has 36 divisors (see below), whose sum is σ = 58165291104984. Its totient is φ = 5360856322880.

The previous prime is 20103211211089. The next prime is 20103211211143. The reversal of 20103211211100 is 111211230102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20103211211100.

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 11 ways as a sum of consecutive naturals, for example, 33505351719 + ... + 33505352318.

It is an arithmetic number, because the mean of its divisors is an integer number (1615702530694).

Almost surely, 2^{20103211211100} is an apocalyptic number.

20103211211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20103211211100 is an abundant number, since it is smaller than the sum of its proper divisors (38062079893884).

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

20103211211100 is a wasteful number, since it uses less digits than its factorization.

20103211211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67010704054 (or 67010704047 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 20103211211100 its reverse (111211230102), we get a palindrome (20214422441202).

The spelling of 20103211211100 in words is "twenty trillion, one hundred three billion, two hundred eleven million, two hundred eleven thousand, one hundred".