10202011222221 has 144 divisors (see below), whose sum is σ = 18785263670784. Its totient is φ = 5220236077056.

The previous prime is 10202011222163. The next prime is 10202011222223. The reversal of 10202011222221 is 12222211020201.

It is a happy number.

10202011222221 is a `hidden beast` number, since 1 + 0 + 20 + 201 + 1 + 222 + 221 = 666.

It is not a de Polignac number, because 10202011222221 - 2¹⁷ = 10202011091149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10202011222194 and 10202011222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202011222223) by changing a digit.

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 143 ways as a sum of consecutive naturals, for example, 132719020 + ... + 132795866.

It is an arithmetic number, because the mean of its divisors is an integer number (130453219936).

Almost surely, 2^{10202011222221} is an apocalyptic number.

It is an amenable number.

10202011222221 is a deficient number, since it is larger than the sum of its proper divisors (8583252448563).

10202011222221 is a wasteful number, since it uses less digits than its factorization.

10202011222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77260 (or 77244 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 10202011222221 its reverse (12222211020201), we get a palindrome (22424222242422).

It can be divided in two parts, 1020201 and 1222221, that added together give a palindrome (2242422).

The spelling of 10202011222221 in words is "ten trillion, two hundred two billion, eleven million, two hundred twenty-two thousand, two hundred twenty-one".