1221010233329 has 4 divisors (see below), whose sum is σ = 1285273929840. Its totient is φ = 1156746536820.

The previous prime is 1221010233319. The next prime is 1221010233371. The reversal of 1221010233329 is 9233320101221.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221010233329 is a prime.

It is a super-3 number, since 3×1221010233329³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221010233319) 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, 32131848227 + ... + 32131848264.

It is an arithmetic number, because the mean of its divisors is an integer number (321318482460).

Almost surely, 2^{1221010233329} is an apocalyptic number.

1221010233329 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1221010233329 is a deficient number, since it is larger than the sum of its proper divisors (64263696511).

1221010233329 is an equidigital number, since it uses as much as digits as its factorization.

1221010233329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64263696510.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 1221010233329 in words is "one trillion, two hundred twenty-one billion, ten million, two hundred thirty-three thousand, three hundred twenty-nine".