21033221011110 has 144 divisors (see below), whose sum is σ = 69397922694672. Its totient is φ = 4370539420800.

The previous prime is 21033221011091. The next prime is 21033221011193. The reversal of 21033221011110 is 1111012233012.

21033221011110 is a `hidden beast` number, since 2 + 1 + 0 + 332 + 210 + 11 + 110 = 666.

It is a super-3 number, since 3×21033221011110³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 216744121 + ... + 216841140.

It is an arithmetic number, because the mean of its divisors is an integer number (481930018713).

Almost surely, 2^{21033221011110} is an apocalyptic number.

21033221011110 is an abundant number, since it is smaller than the sum of its proper divisors (48364701683562).

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

21033221011110 is a wasteful number, since it uses less digits than its factorization.

21033221011110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433585299 (or 433585289 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21033221011110 its reverse (1111012233012), we get a palindrome (22144233244122).

The spelling of 21033221011110 in words is "twenty-one trillion, thirty-three billion, two hundred twenty-one million, eleven thousand, one hundred ten".