21022010221120 has 28 divisors (see below), whose sum is σ = 50058661839804. Its totient is φ = 8408804088320.

The previous prime is 21022010221117. The next prime is 21022010221123. The reversal of 21022010221120 is 2112201022012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21022010221117) and next prime (21022010221123).

It can be written as a sum of positive squares in 2 ways, for example, as 9770225541696 + 11251784679424 = 3125736^2 + 3354368^2 .

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 = 21022010221094 and 21022010221103.

It is not an unprimeable number, because it can be changed into a prime (21022010221123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32846890651 + ... + 32846891290.

Almost surely, 2^{21022010221120} is an apocalyptic number.

21022010221120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022010221120 is an abundant number, since it is smaller than the sum of its proper divisors (29036651618684).

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

21022010221120 is an equidigital number, since it uses as much as digits as its factorization.

21022010221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65693781958 (or 65693781948 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21022010221120 its reverse (2112201022012), we get a palindrome (23134211243132).

The spelling of 21022010221120 in words is "twenty-one trillion, twenty-two billion, ten million, two hundred twenty-one thousand, one hundred twenty".