10221202011220 has 24 divisors (see below), whose sum is σ = 21526027173000. Its totient is φ = 4076765956992.

The previous prime is 10221202011151. The next prime is 10221202011239. The reversal of 10221202011220 is 2211020212201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2228583208336 + 7992618802884 = 1492844^2 + 2827122^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10221202011194 and 10221202011203.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 732170815 + ... + 732184774.

It is an arithmetic number, because the mean of its divisors is an integer number (896917798875).

Almost surely, 2^{10221202011220} is an apocalyptic number.

10221202011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10221202011220 is an abundant number, since it is smaller than the sum of its proper divisors (11304825161780).

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

10221202011220 is a wasteful number, since it uses less digits than its factorization.

10221202011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464355947 (or 1464355945 counting only the distinct ones).

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

Adding to 10221202011220 its reverse (2211020212201), we get a palindrome (12432222223421).

The spelling of 10221202011220 in words is "ten trillion, two hundred twenty-one billion, two hundred two million, eleven thousand, two hundred twenty".