311212320123 has 8 divisors (see below), whose sum is σ = 415935390736. Its totient is φ = 206982064800.

The previous prime is 311212320121. The next prime is 311212320179. The reversal of 311212320123 is 321023212113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 311212320123 - 2¹ = 311212320121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311212320123.

It is not an unprimeable number, because it can be changed into a prime (311212320121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123202348 + ... + 123204873.

It is an arithmetic number, because the mean of its divisors is an integer number (51991923842).

Almost surely, 2^311212320123 is an apocalyptic number.

311212320123 is a deficient number, since it is larger than the sum of its proper divisors (104723070613).

311212320123 is a wasteful number, since it uses less digits than its factorization.

311212320123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246407645.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 311212320123 its reverse (321023212113), we get a palindrome (632235532236).

The spelling of 311212320123 in words is "three hundred eleven billion, two hundred twelve million, three hundred twenty thousand, one hundred twenty-three".