10221121202020 has 12 divisors (see below), whose sum is σ = 21464354524284. Its totient is φ = 4088448480800.

The previous prime is 10221121202011. The next prime is 10221121202059. The reversal of 10221121202020 is 2020212112201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7597829165056 + 2623292036964 = 2756416^2 + 1619658^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10221121201985 and 10221121202003.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255528030031 + ... + 255528030070.

It is an arithmetic number, because the mean of its divisors is an integer number (1788696210357).

Almost surely, 2^{10221121202020} is an apocalyptic number.

10221121202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10221121202020 is an abundant number, since it is smaller than the sum of its proper divisors (11243233322264).

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

10221121202020 is a wasteful number, since it uses less digits than its factorization.

10221121202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511056060110 (or 511056060108 counting only the distinct ones).

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

Adding to 10221121202020 its reverse (2020212112201), we get a palindrome (12241333314221).

The spelling of 10221121202020 in words is "ten trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred two thousand, twenty".