31210323144421 has 4 divisors (see below), whose sum is σ = 31298737657932. Its totient is φ = 31121908630912.

The previous prime is 31210323144367. The next prime is 31210323144433. The reversal of 31210323144421 is 12444132301213.

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 22401809633025 + 8808513511396 = 4733055^2 + 2967914^2 .

It is a cyclic number.

It is not a de Polignac number, because 31210323144421 - 2¹¹ = 31210323142373 is a prime.

It is a super-2 number, since 2×31210323144421² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31210323144461) 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, 44207256226 + ... + 44207256931.

It is an arithmetic number, because the mean of its divisors is an integer number (7824684414483).

Almost surely, 2^{31210323144421} is an apocalyptic number.

It is an amenable number.

31210323144421 is a deficient number, since it is larger than the sum of its proper divisors (88414513511).

31210323144421 is an equidigital number, since it uses as much as digits as its factorization.

31210323144421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88414513510.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 31210323144421 its reverse (12444132301213), we get a palindrome (43654455445634).

The spelling of 31210323144421 in words is "thirty-one trillion, two hundred ten billion, three hundred twenty-three million, one hundred forty-four thousand, four hundred twenty-one".