3130312211021 has 4 divisors (see below), whose sum is σ = 3314448223452. Its totient is φ = 2946176198592.

The previous prime is 3130312211011. The next prime is 3130312211041. The reversal of 3130312211021 is 1201122130313.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1876776702025 + 1253535508996 = 1369955^2 + 1119614^2 .

It is a cyclic number.

It is not a de Polignac number, because 3130312211021 - 2⁶ = 3130312210957 is a prime.

It is a super-4 number, since 4×3130312211021⁴ (a number of 51 digits) contains 4444 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3130312210984 and 3130312211002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3130312211011) 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, 92068006190 + ... + 92068006223.

It is an arithmetic number, because the mean of its divisors is an integer number (828612055863).

Almost surely, 2^{3130312211021} is an apocalyptic number.

It is an amenable number.

3130312211021 is a deficient number, since it is larger than the sum of its proper divisors (184136012431).

3130312211021 is a wasteful number, since it uses less digits than its factorization.

3130312211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184136012430.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 3130312211021 its reverse (1201122130313), we get a palindrome (4331434341334).

The spelling of 3130312211021 in words is "three trillion, one hundred thirty billion, three hundred twelve million, two hundred eleven thousand, twenty-one".