20011000002100 has 72 divisors (see below), whose sum is σ = 45438676683008. Its totient is φ = 7640081222400.

The previous prime is 20011000002067. The next prime is 20011000002107. The reversal of 20011000002100 is 120000011002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011000002107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43987134 + ... + 44439733.

Almost surely, 2^{20011000002100} is an apocalyptic number.

20011000002100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011000002100 is an abundant number, since it is smaller than the sum of its proper divisors (25427676680908).

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

20011000002100 is a wasteful number, since it uses less digits than its factorization.

20011000002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88426985 (or 88426978 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20011000002100 its reverse (120000011002), we get a palindrome (20131000013102).

The spelling of 20011000002100 in words is "twenty trillion, eleven billion, two thousand, one hundred".