1221323001298 has 4 divisors (see below), whose sum is σ = 1831984501950. Its totient is φ = 610661500648.

The previous prime is 1221323001253. The next prime is 1221323001317. The reversal of 1221323001298 is 8921003231221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 949332589569 + 271990411729 = 974337^2 + 521527^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305330750323 + ... + 305330750326.

Almost surely, 2^{1221323001298} is an apocalyptic number.

1221323001298 is a deficient number, since it is larger than the sum of its proper divisors (610661500652).

1221323001298 is an equidigital number, since it uses as much as digits as its factorization.

1221323001298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610661500651.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 1221323001298 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-three million, one thousand, two hundred ninety-eight".