1221312443234 has 8 divisors (see below), whose sum is σ = 1972889331420. Its totient is φ = 563682666096.

The previous prime is 1221312443209. The next prime is 1221312443261. The reversal of 1221312443234 is 4323442131221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1179124515625 + 42187927609 = 1085875^2 + 205397^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1221312443234.

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, 23486777729 + ... + 23486777780.

Almost surely, 2^{1221312443234} is an apocalyptic number.

1221312443234 is a deficient number, since it is larger than the sum of its proper divisors (751576888186).

1221312443234 is a wasteful number, since it uses less digits than its factorization.

1221312443234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46973555524.

The product of its digits is 27648, while the sum is 32.

Adding to 1221312443234 its reverse (4323442131221), we get a palindrome (5544754574455).

The spelling of 1221312443234 in words is "one trillion, two hundred twenty-one billion, three hundred twelve million, four hundred forty-three thousand, two hundred thirty-four".