20111203100 has 18 divisors (see below), whose sum is σ = 43641310944. Its totient is φ = 8044481200.

The previous prime is 20111203067. The next prime is 20111203129. The reversal of 20111203100 is 130211102.

It is a super-2 number, since 2×20111203100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100555916 + ... + 100556115.

Almost surely, 2^20111203100 is an apocalyptic number.

20111203100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111203100 is an abundant number, since it is smaller than the sum of its proper divisors (23530107844).

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

20111203100 is a wasteful number, since it uses less digits than its factorization.

20111203100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201112045 (or 201112038 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20111203100 its reverse (130211102), we get a palindrome (20241414202).

The spelling of 20111203100 in words is "twenty billion, one hundred eleven million, two hundred three thousand, one hundred".