10221200001220 has 36 divisors (see below), whose sum is σ = 23242645927620. Its totient is φ = 3773981537664.

The previous prime is 10221200001191. The next prime is 10221200001239. The reversal of 10221200001220 is 2210000212201.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2002015585476 + 8219184415744 = 1414926^2 + 2866912^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 10221200001220.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1512008455 + ... + 1512015214.

It is an arithmetic number, because the mean of its divisors is an integer number (645629053545).

Almost surely, 2^{10221200001220} is an apocalyptic number.

10221200001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10221200001220 is an abundant number, since it is smaller than the sum of its proper divisors (13021445926400).

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

10221200001220 is a wasteful number, since it uses less digits than its factorization.

10221200001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024023704 (or 3024023689 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10221200001220 its reverse (2210000212201), we get a palindrome (12431200213421).

The spelling of 10221200001220 in words is "ten trillion, two hundred twenty-one billion, two hundred million, one thousand, two hundred twenty".