12031512222266 has 4 divisors (see below), whose sum is σ = 18047268333402. Its totient is φ = 6015756111132.

The previous prime is 12031512222253. The next prime is 12031512222271. The reversal of 12031512222266 is 66222221513021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12013467942025 + 18044280241 = 3466045^2 + 134329^2 .

It is a super-2 number, since 2×12031512222266² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3007878055565 + ... + 3007878055568.

Almost surely, 2^{12031512222266} is an apocalyptic number.

12031512222266 is a deficient number, since it is larger than the sum of its proper divisors (6015756111136).

12031512222266 is an equidigital number, since it uses as much as digits as its factorization.

12031512222266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6015756111135.

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 12031512222266 its reverse (66222221513021), we get a palindrome (78253733735287).

The spelling of 12031512222266 in words is "twelve trillion, thirty-one billion, five hundred twelve million, two hundred twenty-two thousand, two hundred sixty-six".