21220241442122 has 32 divisors (see below), whose sum is σ = 32943867675264. Its totient is φ = 10244429568000.

The previous prime is 21220241442121. The next prime is 21220241442133. The reversal of 21220241442122 is 22124414202212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21220241442121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12737393 + ... + 14306699.

It is an arithmetic number, because the mean of its divisors is an integer number (1029495864852).

Almost surely, 2^{21220241442122} is an apocalyptic number.

21220241442122 is a deficient number, since it is larger than the sum of its proper divisors (11723626233142).

21220241442122 is a wasteful number, since it uses less digits than its factorization.

21220241442122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571054.

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 21220241442122 its reverse (22124414202212), we get a palindrome (43344655644334).

The spelling of 21220241442122 in words is "twenty-one trillion, two hundred twenty billion, two hundred forty-one million, four hundred forty-two thousand, one hundred twenty-two".