10001021222220 has 96 divisors (see below), whose sum is σ = 32042155127808. Its totient is φ = 2283170049792.

The previous prime is 10001021222207. The next prime is 10001021222261. The reversal of 10001021222220 is 2222212010001.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 10001021222220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14120899 + ... + 14812218.

It is an arithmetic number, because the mean of its divisors is an integer number (333772449248).

Almost surely, 2^{10001021222220} is an apocalyptic number.

10001021222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10001021222220 is an abundant number, since it is smaller than the sum of its proper divisors (22041133905588).

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

10001021222220 is a wasteful number, since it uses less digits than its factorization.

10001021222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28933959 (or 28933957 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 10001021222220 its reverse (2222212010001), we get a palindrome (12223233232221).

The spelling of 10001021222220 in words is "ten trillion, one billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty".