10021222021221 has 48 divisors (see below), whose sum is σ = 15738188544000. Its totient is φ = 6121236886560.

The previous prime is 10021222021201. The next prime is 10021222021229. The reversal of 10021222021221 is 12212022212001.

It is a happy number.

10021222021221 is a `hidden beast` number, since 1 + 0 + 0 + 212 + 220 + 212 + 21 = 666.

It is not a de Polignac number, because 10021222021221 - 2¹³ = 10021222013029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10021222021194 and 10021222021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021222021229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7998490 + ... + 9166148.

It is an arithmetic number, because the mean of its divisors is an integer number (327878928000).

Almost surely, 2^{10021222021221} is an apocalyptic number.

It is an amenable number.

10021222021221 is a deficient number, since it is larger than the sum of its proper divisors (5716966522779).

10021222021221 is a wasteful number, since it uses less digits than its factorization.

10021222021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169334 (or 1169331 counting only the distinct ones).

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

Adding to 10021222021221 its reverse (12212022212001), we get a palindrome (22233244233222).

The spelling of 10021222021221 in words is "ten trillion, twenty-one billion, two hundred twenty-two million, twenty-one thousand, two hundred twenty-one".