1221332293 has 4 divisors (see below), whose sum is σ = 1285612960. Its totient is φ = 1157051628.

The previous prime is 1221332263. The next prime is 1221332339. The reversal of 1221332293 is 3922331221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3922331221 = 719 ⋅5455259.

It is a cyclic number.

It is not a de Polignac number, because 1221332293 - 2⁵ = 1221332261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221332263) 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, 32140305 + ... + 32140342.

It is an arithmetic number, because the mean of its divisors is an integer number (321403240).

Almost surely, 2^1221332293 is an apocalyptic number.

It is an amenable number.

1221332293 is a deficient number, since it is larger than the sum of its proper divisors (64280667).

1221332293 is an equidigital number, since it uses as much as digits as its factorization.

1221332293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64280666.

The product of its digits is 3888, while the sum is 28.

The square root of 1221332293 is about 34947.5649080161. The cubic root of 1221332293 is about 1068.9185489426.

The spelling of 1221332293 in words is "one billion, two hundred twenty-one million, three hundred thirty-two thousand, two hundred ninety-three".