21010011100220 has 24 divisors (see below), whose sum is σ = 44121115072944. Its totient is φ = 8403986961536.

The previous prime is 21010011100193. The next prime is 21010011100241. The reversal of 21010011100220 is 2200111001012.

It is a super-2 number, since 2×21010011100220² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13553672 + ... + 15024048.

It is an arithmetic number, because the mean of its divisors is an integer number (1838379794706).

Almost surely, 2^{21010011100220} is an apocalyptic number.

21010011100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010011100220 is an abundant number, since it is smaller than the sum of its proper divisors (23111103972724).

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

21010011100220 is a wasteful number, since it uses less digits than its factorization.

21010011100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184829 (or 2184827 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21010011100220 its reverse (2200111001012), we get a palindrome (23210122101232).

The spelling of 21010011100220 in words is "twenty-one trillion, ten billion, eleven million, one hundred thousand, two hundred twenty".