1242140222 has 4 divisors (see below), whose sum is σ = 1863210336. Its totient is φ = 621070110.

The previous prime is 1242140213. The next prime is 1242140227. The reversal of 1242140222 is 2220412421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2220412421 = 1879 ⋅1181699.

It is a super-2 number, since 2×1242140222² = 3085824662220418568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1242140194 and 1242140203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242140227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310535054 + ... + 310535057.

It is an arithmetic number, because the mean of its divisors is an integer number (465802584).

Almost surely, 2^1242140222 is an apocalyptic number.

1242140222 is a deficient number, since it is larger than the sum of its proper divisors (621070114).

1242140222 is an equidigital number, since it uses as much as digits as its factorization.

1242140222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621070113.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1242140222 is about 35244.0097321516. The cubic root of 1242140222 is about 1074.9548124507.

Adding to 1242140222 its reverse (2220412421), we get a palindrome (3462552643).

The spelling of 1242140222 in words is "one billion, two hundred forty-two million, one hundred forty thousand, two hundred twenty-two".