31411130021 has 4 divisors (see below), whose sum is σ = 31411988844. Its totient is φ = 31410271200.

The previous prime is 31411129979. The next prime is 31411130077. The reversal of 31411130021 is 12003111413.

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 13411956100 + 17999173921 = 115810^2 + 134161^2 .

It is a cyclic number.

It is not a de Polignac number, because 31411130021 - 2¹⁰ = 31411128997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31411132021) 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, 371990 + ... + 448551.

It is an arithmetic number, because the mean of its divisors is an integer number (7852997211).

Almost surely, 2^31411130021 is an apocalyptic number.

It is an amenable number.

31411130021 is a deficient number, since it is larger than the sum of its proper divisors (858823).

31411130021 is an equidigital number, since it uses as much as digits as its factorization.

31411130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858822.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31411130021 its reverse (12003111413), we get a palindrome (43414241434).

The spelling of 31411130021 in words is "thirty-one billion, four hundred eleven million, one hundred thirty thousand, twenty-one".