21110010002000 has 120 divisors (see below), whose sum is σ = 53871928696872. Its totient is φ = 7999582464000.

The previous prime is 21110010001987. The next prime is 21110010002069. The reversal of 21110010002000 is 20001001112.

It can be written as a sum of positive squares in 4 ways, for example, as 12413525056 + 21097596476944 = 111416^2 + 4593212^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13897121 + ... + 15341120.

Almost surely, 2^{21110010002000} is an apocalyptic number.

21110010002000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110010002000 is an abundant number, since it is smaller than the sum of its proper divisors (32761918694872).

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

21110010002000 is a wasteful number, since it uses less digits than its factorization.

21110010002000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29238302 (or 29238267 counting only the distinct ones).

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

Adding to 21110010002000 its reverse (20001001112), we get a palindrome (21130011003112).

The spelling of 21110010002000 in words is "twenty-one trillion, one hundred ten billion, ten million, two thousand".