10221212202021 has 24 divisors (see below), whose sum is σ = 15485616516864. Its totient is φ = 6488912164320.

The previous prime is 10221212201987. The next prime is 10221212202043. The reversal of 10221212202021 is 12020221212201.

It is a happy number.

10221212202021 is a `hidden beast` number, since 1 + 0 + 221 + 21 + 220 + 202 + 1 = 666.

It is not a de Polignac number, because 10221212202021 - 2¹⁴ = 10221212185637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10221212201985 and 10221212202003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221212207021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 326519785 + ... + 326551086.

It is an arithmetic number, because the mean of its divisors is an integer number (645234021536).

Almost surely, 2^{10221212202021} is an apocalyptic number.

It is an amenable number.

10221212202021 is a deficient number, since it is larger than the sum of its proper divisors (5264404314843).

10221212202021 is a wasteful number, since it uses less digits than its factorization.

10221212202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653070961 (or 653070958 counting only the distinct ones).

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

Adding to 10221212202021 its reverse (12020221212201), we get a palindrome (22241433414222).

The spelling of 10221212202021 in words is "ten trillion, two hundred twenty-one billion, two hundred twelve million, two hundred two thousand, twenty-one".