10221020212 has 12 divisors (see below), whose sum is σ = 19262692036. Its totient is φ = 4717393920.

The previous prime is 10221020207. The next prime is 10221020221. The reversal of 10221020212 is 21202012201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6455479716 + 3765540496 = 80346^2 + 61364^2 .

It is a super-2 number, since 2×10221020212² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 10221020192 and 10221020201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98278989 + ... + 98279092.

Almost surely, 2^10221020212 is an apocalyptic number.

It is an amenable number.

10221020212 is a deficient number, since it is larger than the sum of its proper divisors (9041671824).

10221020212 is a wasteful number, since it uses less digits than its factorization.

10221020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196558098 (or 196558096 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10221020212 its reverse (21202012201), we get a palindrome (31423032413).

The spelling of 10221020212 in words is "ten billion, two hundred twenty-one million, twenty thousand, two hundred twelve".