21010245021200 has 60 divisors (see below), whose sum is σ = 50478925808640. Its totient is φ = 8403796298880.

The previous prime is 21010245021187. The next prime is 21010245021253. The reversal of 21010245021200 is 212054201012.

It is a super-3 number, since 3×21010245021200³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10382897 + ... + 12240303.

It is an arithmetic number, because the mean of its divisors is an integer number (841315430144).

Almost surely, 2^{21010245021200} is an apocalyptic number.

21010245021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010245021200 is an abundant number, since it is smaller than the sum of its proper divisors (29468680787440).

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

21010245021200 is a wasteful number, since it uses less digits than its factorization.

21010245021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885704 (or 1885693 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 21010245021200 its reverse (212054201012), we get a palindrome (21222299222212).

The spelling of 21010245021200 in words is "twenty-one trillion, ten billion, two hundred forty-five million, twenty-one thousand, two hundred".