311001020001223 has 4 divisors (see below), whose sum is σ = 312612424250128. Its totient is φ = 309389615752320.

The previous prime is 311001020001179. The next prime is 311001020001229. The reversal of 311001020001223 is 322100020100113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311001020001223 is a prime.

It is a super-2 number, since 2×311001020001223² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311001020001197 and 311001020001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311001020001229) 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, 805702124163 + ... + 805702124548.

It is an arithmetic number, because the mean of its divisors is an integer number (78153106062532).

Almost surely, 2^{311001020001223} is an apocalyptic number.

311001020001223 is a deficient number, since it is larger than the sum of its proper divisors (1611404248905).

311001020001223 is a wasteful number, since it uses less digits than its factorization.

311001020001223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611404248904.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 311001020001223 its reverse (322100020100113), we get a palindrome (633101040101336).

The spelling of 311001020001223 in words is "three hundred eleven trillion, one billion, twenty million, one thousand, two hundred twenty-three".