2221102121020 has 24 divisors (see below), whose sum is σ = 4666293473184. Its totient is φ = 888063892416.

The previous prime is 2221102120973. The next prime is 2221102121047. The reversal of 2221102121020 is 201212011222.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2221102120985 and 2221102121003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23511432 + ... + 23605711.

It is an arithmetic number, because the mean of its divisors is an integer number (194428894716).

Almost surely, 2^{2221102121020} is an apocalyptic number.

2221102121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221102121020 is an abundant number, since it is smaller than the sum of its proper divisors (2445191352164).

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

2221102121020 is a wasteful number, since it uses less digits than its factorization.

2221102121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47119509 (or 47119507 counting only the distinct ones).

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

Adding to 2221102121020 its reverse (201212011222), we get a palindrome (2422314132242).

The spelling of 2221102121020 in words is "two trillion, two hundred twenty-one billion, one hundred two million, one hundred twenty-one thousand, twenty".