312101021131 has 4 divisors (see below), whose sum is σ = 312167106952. Its totient is φ = 312034935312.

The previous prime is 312101021129. The next prime is 312101021159. The reversal of 312101021131 is 131120101213.

It is a happy number.

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 312101021131 - 2¹ = 312101021129 is a prime.

It is a super-2 number, since 2×312101021131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312101021231) 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, 33035826 + ... + 33045271.

It is an arithmetic number, because the mean of its divisors is an integer number (78041776738).

Almost surely, 2^312101021131 is an apocalyptic number.

312101021131 is a deficient number, since it is larger than the sum of its proper divisors (66085821).

312101021131 is an equidigital number, since it uses as much as digits as its factorization.

312101021131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66085820.

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

Adding to 312101021131 its reverse (131120101213), we get a palindrome (443221122344).

The spelling of 312101021131 in words is "three hundred twelve billion, one hundred one million, twenty-one thousand, one hundred thirty-one".