20011100201000 has 64 divisors (see below), whose sum is σ = 47068596553680. Its totient is φ = 7962966220800.

The previous prime is 20011100200991. The next prime is 20011100201017. The reversal of 20011100201000 is 10200111002.

It can be written as a sum of positive squares in 8 ways, for example, as 512676048196 + 19498424152804 = 716014^2 + 4415702^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51649229 + ... + 52035228.

Almost surely, 2^{20011100201000} is an apocalyptic number.

20011100201000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011100201000 is an abundant number, since it is smaller than the sum of its proper divisors (27057496352680).

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

20011100201000 is a wasteful number, since it uses less digits than its factorization.

20011100201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103684671 (or 103684657 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20011100201000 its reverse (10200111002), we get a palindrome (20021300312002).

The spelling of 20011100201000 in words is "twenty trillion, eleven billion, one hundred million, two hundred one thousand".