10202212066 has 4 divisors (see below), whose sum is σ = 15303318102. Its totient is φ = 5101106032.

The previous prime is 10202212019. The next prime is 10202212067. The reversal of 10202212066 is 66021220201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66021220201 = 1931 ⋅34190171.

It can be written as a sum of positive squares in only one way, i.e., 8850105625 + 1352106441 = 94075^2 + 36771^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (10202212067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550553015 + ... + 2550553018.

Almost surely, 2^10202212066 is an apocalyptic number.

10202212066 is a deficient number, since it is larger than the sum of its proper divisors (5101106036).

10202212066 is an equidigital number, since it uses as much as digits as its factorization.

10202212066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101106035.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 10202212066 its reverse (66021220201), we get a palindrome (76223432267).

The spelling of 10202212066 in words is "ten billion, two hundred two million, two hundred twelve thousand, sixty-six".