21010012220000 has 120 divisors (see below), whose sum is σ = 53470120334400. Its totient is φ = 8114211392000.

The previous prime is 21010012219957. The next prime is 21010012220009. The reversal of 21010012220000 is 2221001012.

It is a happy number.

It is a super-2 number, since 2×21010012220000² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010012220009) 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 19 ways as a sum of consecutive naturals, for example, 17532080 + ... + 18692079.

It is an arithmetic number, because the mean of its divisors is an integer number (445584336120).

Almost surely, 2^{21010012220000} is an apocalyptic number.

21010012220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010012220000 is an abundant number, since it is smaller than the sum of its proper divisors (32460108114400).

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

21010012220000 is an equidigital number, since it uses as much as digits as its factorization.

21010012220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36224218 (or 36224195 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21010012220000 its reverse (2221001012), we get a palindrome (21012233221012).

The spelling of 21010012220000 in words is "twenty-one trillion, ten billion, twelve million, two hundred twenty thousand".