21220211343012 has 48 divisors (see below), whose sum is σ = 54015440818752. Its totient is φ = 6430324526080.

The previous prime is 21220211342983. The next prime is 21220211343043. The reversal of 21220211343012 is 21034311202212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23638408 + ... + 24519680.

It is an arithmetic number, because the mean of its divisors is an integer number (1125321683724).

Almost surely, 2^{21220211343012} is an apocalyptic number.

21220211343012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21220211343012 is an abundant number, since it is smaller than the sum of its proper divisors (32795229475740).

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

21220211343012 is a wasteful number, since it uses less digits than its factorization.

21220211343012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063708 (or 1063706 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21220211343012 its reverse (21034311202212), we get a palindrome (42254522545224).

The spelling of 21220211343012 in words is "twenty-one trillion, two hundred twenty billion, two hundred eleven million, three hundred forty-three thousand, twelve".