1222212142 has 8 divisors (see below), whose sum is σ = 1844566056. Its totient is φ = 607356792.

The previous prime is 1222212139. The next prime is 1222212143. The reversal of 1222212142 is 2412122221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222212143) 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, 1874233 + ... + 1874884.

It is an arithmetic number, because the mean of its divisors is an integer number (230570757).

Almost surely, 2^1222212142 is an apocalyptic number.

1222212142 is a deficient number, since it is larger than the sum of its proper divisors (622353914).

1222212142 is a wasteful number, since it uses less digits than its factorization.

1222212142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3749282.

The product of its digits is 256, while the sum is 19.

The square root of 1222212142 is about 34960.1507719861. The cubic root of 1222212142 is about 1069.1751706579.

Adding to 1222212142 its reverse (2412122221), we get a palindrome (3634334363).

The spelling of 1222212142 in words is "one billion, two hundred twenty-two million, two hundred twelve thousand, one hundred forty-two".