20001011112100 has 18 divisors (see below), whose sum is σ = 43402194113474. Its totient is φ = 8000404444800.

The previous prime is 20001011112097. The next prime is 20001011112139. The reversal of 20001011112100 is 121111010002.

It can be written as a sum of positive squares in 3 ways, for example, as 155999721024 + 19845011391076 = 394968^2 + 4454774^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 100005055461 + ... + 100005055660.

Almost surely, 2^{20001011112100} is an apocalyptic number.

20001011112100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001011112100 is an abundant number, since it is smaller than the sum of its proper divisors (23401183001374).

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

20001011112100 is a wasteful number, since it uses less digits than its factorization.

20001011112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200010111135 (or 200010111128 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20001011112100 its reverse (121111010002), we get a palindrome (20122122122102).

The spelling of 20001011112100 in words is "twenty trillion, one billion, eleven million, one hundred twelve thousand, one hundred".