1010220111221 has 8 divisors (see below), whose sum is σ = 1045359805080. Its totient is φ = 975100718592.

The previous prime is 1010220111217. The next prime is 1010220111247. The reversal of 1010220111221 is 1221110220101.

It can be written as a sum of positive squares in 4 ways, for example, as 358817772196 + 651402339025 = 599014^2 + 807095^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1010220111221 - 2² = 1010220111217 is a prime.

It is a super-2 number, since 2×1010220111221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010220111196 and 1010220111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010220161221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4974020 + ... + 5173133.

It is an arithmetic number, because the mean of its divisors is an integer number (130669975635).

Almost surely, 2^{1010220111221} is an apocalyptic number.

It is an amenable number.

1010220111221 is a deficient number, since it is larger than the sum of its proper divisors (35139693859).

1010220111221 is a wasteful number, since it uses less digits than its factorization.

1010220111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10150615.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1010220111221 its reverse (1221110220101), we get a palindrome (2231330331322).

The spelling of 1010220111221 in words is "one trillion, ten billion, two hundred twenty million, one hundred eleven thousand, two hundred twenty-one".