1213305220929 has 4 divisors (see below), whose sum is σ = 1617740294576. Its totient is φ = 808870147284.

The previous prime is 1213305220909. The next prime is 1213305220949. The reversal of 1213305220929 is 9290225033121.

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 an interprime number because it is at equal distance from previous prime (1213305220909) and next prime (1213305220949).

It is not a de Polignac number, because 1213305220929 - 2⁹ = 1213305220417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213305220909) 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, 202217536819 + ... + 202217536824.

It is an arithmetic number, because the mean of its divisors is an integer number (404435073644).

Almost surely, 2^{1213305220929} is an apocalyptic number.

It is an amenable number.

1213305220929 is a deficient number, since it is larger than the sum of its proper divisors (404435073647).

1213305220929 is an equidigital number, since it uses as much as digits as its factorization.

1213305220929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404435073646.

The product of its (nonzero) digits is 58320, while the sum is 39.

The spelling of 1213305220929 in words is "one trillion, two hundred thirteen billion, three hundred five million, two hundred twenty thousand, nine hundred twenty-nine".