10122221212066 has 8 divisors (see below), whose sum is σ = 15249634577820. Its totient is φ = 5039009686128.

The previous prime is 10122221212039. The next prime is 10122221212067. The reversal of 10122221212066 is 66021212222101.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7841562477841 + 2280658734225 = 2800279^2 + 1510185^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (10122221212067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11050459381 + ... + 11050460296.

Almost surely, 2^{10122221212066} is an apocalyptic number.

10122221212066 is a deficient number, since it is larger than the sum of its proper divisors (5127413365754).

10122221212066 is a wasteful number, since it uses less digits than its factorization.

10122221212066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22100919908.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 10122221212066 its reverse (66021212222101), we get a palindrome (76143433434167).

The spelling of 10122221212066 in words is "ten trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, sixty-six".