22121244120020 has 48 divisors (see below), whose sum is σ = 48061037298960. Its totient is φ = 8542569670656.

The previous prime is 22121244119993. The next prime is 22121244120077. The reversal of 22121244120020 is 2002144212122.

It can be written as a sum of positive squares in 8 ways, for example, as 1512713045776 + 20608531074244 = 1229924^2 + 4539662^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4358684 + ... + 7952396.

It is an arithmetic number, because the mean of its divisors is an integer number (1001271610395).

Almost surely, 2^{22121244120020} is an apocalyptic number.

22121244120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121244120020 is an abundant number, since it is smaller than the sum of its proper divisors (25939793178940).

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

22121244120020 is a wasteful number, since it uses less digits than its factorization.

22121244120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3604364 (or 3604362 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 22121244120020 its reverse (2002144212122), we get a palindrome (24123388332142).

The spelling of 22121244120020 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred forty-four million, one hundred twenty thousand, twenty".