345212121767 has 4 divisors (see below), whose sum is σ = 352557060576. Its totient is φ = 337867182960.

The previous prime is 345212121701. The next prime is 345212121773. The reversal of 345212121767 is 767121212543.

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

It is a cyclic number.

It is not a de Polignac number, because 345212121767 - 2³⁸ = 70334214823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345212121167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3672469334 + ... + 3672469427.

It is an arithmetic number, because the mean of its divisors is an integer number (88139265144).

Almost surely, 2^345212121767 is an apocalyptic number.

345212121767 is a deficient number, since it is larger than the sum of its proper divisors (7344938809).

345212121767 is an equidigital number, since it uses as much as digits as its factorization.

345212121767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7344938808.

The product of its digits is 141120, while the sum is 41.

The spelling of 345212121767 in words is "three hundred forty-five billion, two hundred twelve million, one hundred twenty-one thousand, seven hundred sixty-seven".