10221112221021 has 12 divisors (see below), whose sum is σ = 15899507899548. Its totient is φ = 6289915212864.

The previous prime is 10221112221013. The next prime is 10221112221041. The reversal of 10221112221021 is 12012221112201.

10221112221021 is a `hidden beast` number, since 102 + 211 + 122 + 210 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6440378084100 + 3780734136921 = 2537790^2 + 1944411^2 .

It is not a de Polignac number, because 10221112221021 - 2³ = 10221112221013 is a prime.

It is a super-2 number, since 2×10221112221021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10221112220985 and 10221112221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221112221041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43679966640 + ... + 43679966873.

It is an arithmetic number, because the mean of its divisors is an integer number (1324958991629).

Almost surely, 2^{10221112221021} is an apocalyptic number.

It is an amenable number.

10221112221021 is a deficient number, since it is larger than the sum of its proper divisors (5678395678527).

10221112221021 is a wasteful number, since it uses less digits than its factorization.

10221112221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87359933532 (or 87359933529 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 10221112221021 its reverse (12012221112201), we get a palindrome (22233333333222).

The spelling of 10221112221021 in words is "ten trillion, two hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, twenty-one".