21022021111120 has 40 divisors (see below), whose sum is σ = 48876409102464. Its totient is φ = 8408772312192.

The previous prime is 21022021111103. The next prime is 21022021111129. The reversal of 21022021111120 is 2111112022012.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 21022021111094 and 21022021111103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022021111129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25839997 + ... + 26641123.

Almost surely, 2^{21022021111120} is an apocalyptic number.

21022021111120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022021111120 is an abundant number, since it is smaller than the sum of its proper divisors (27854387991344).

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

21022021111120 is a wasteful number, since it uses less digits than its factorization.

21022021111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129147 (or 1129141 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21022021111120 its reverse (2111112022012), we get a palindrome (23133133133132).

The spelling of 21022021111120 in words is "twenty-one trillion, twenty-two billion, twenty-one million, one hundred eleven thousand, one hundred twenty".