312031211101 has 4 divisors (see below), whose sum is σ = 314947390752. Its totient is φ = 309115031452.

The previous prime is 312031211081. The next prime is 312031211113. The reversal of 312031211101 is 101112130213.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 101112130213 = 31991 ⋅3160643.

It is a cyclic number.

It is not a de Polignac number, because 312031211101 - 2¹⁷ = 312031080029 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 (312031311101) 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, 1458089665 + ... + 1458089878.

It is an arithmetic number, because the mean of its divisors is an integer number (78736847688).

Almost surely, 2^312031211101 is an apocalyptic number.

It is an amenable number.

312031211101 is a deficient number, since it is larger than the sum of its proper divisors (2916179651).

312031211101 is a wasteful number, since it uses less digits than its factorization.

312031211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916179650.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 312031211101 its reverse (101112130213), we get a palindrome (413143341314).

The spelling of 312031211101 in words is "three hundred twelve billion, thirty-one million, two hundred eleven thousand, one hundred one".