1226212138 has 8 divisors (see below), whose sum is σ = 1853359200. Its totient is φ = 608425740.

The previous prime is 1226212111. The next prime is 1226212147. The reversal of 1226212138 is 8312126221.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2339838 + ... + 2340361.

It is an arithmetic number, because the mean of its divisors is an integer number (231669900).

Almost surely, 2^1226212138 is an apocalyptic number.

1226212138 is a deficient number, since it is larger than the sum of its proper divisors (627147062).

1226212138 is a wasteful number, since it uses less digits than its factorization.

1226212138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4680332.

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

The square root of 1226212138 is about 35017.3119756500. The cubic root of 1226212138 is about 1070.3402819079.

Adding to 1226212138 its reverse (8312126221), we get a palindrome (9538338359).

The spelling of 1226212138 in words is "one billion, two hundred twenty-six million, two hundred twelve thousand, one hundred thirty-eight".