12142244677 has 4 divisors (see below), whose sum is σ = 12151967500. Its totient is φ = 12132521856.

The previous prime is 12142244573. The next prime is 12142244689. The reversal of 12142244677 is 77644224121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77644224121 = 31 ⋅2504652391.

It can be written as a sum of positive squares in 2 ways, for example, as 3061298241 + 9080946436 = 55329^2 + 95294^2 .

It is a cyclic number.

It is not a de Polignac number, because 12142244677 - 2¹⁵ = 12142211909 is a prime.

It is a super-2 number, since 2×12142244677² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12142344677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4859538 + ... + 4862035.

It is an arithmetic number, because the mean of its divisors is an integer number (3037991875).

Almost surely, 2^12142244677 is an apocalyptic number.

It is an amenable number.

12142244677 is a deficient number, since it is larger than the sum of its proper divisors (9722823).

12142244677 is an equidigital number, since it uses as much as digits as its factorization.

12142244677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9722822.

The product of its digits is 150528, while the sum is 40.

Adding to 12142244677 its reverse (77644224121), we get a palindrome (89786468798).

The spelling of 12142244677 in words is "twelve billion, one hundred forty-two million, two hundred forty-four thousand, six hundred seventy-seven".