311212201023 has 12 divisors (see below), whose sum is σ = 449700279288. Its totient is φ = 207395626320.

The previous prime is 311212201019. The next prime is 311212201031. The reversal of 311212201023 is 320102212113.

It is not a de Polignac number, because 311212201023 - 2² = 311212201019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311212200987 and 311212201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311212201033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6572965 + ... + 6620142.

It is an arithmetic number, because the mean of its divisors is an integer number (37475023274).

Almost surely, 2^311212201023 is an apocalyptic number.

311212201023 is a deficient number, since it is larger than the sum of its proper divisors (138488078265).

311212201023 is a wasteful number, since it uses less digits than its factorization.

311212201023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13195734 (or 13195731 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 311212201023 its reverse (320102212113), we get a palindrome (631314413136).

The spelling of 311212201023 in words is "three hundred eleven billion, two hundred twelve million, two hundred one thousand, twenty-three".