31023021103133 has 4 divisors (see below), whose sum is σ = 31023512060220. Its totient is φ = 31022530146048.

The previous prime is 31023021103091. The next prime is 31023021103153. The reversal of 31023021103133 is 33130112032013.

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 26705361004729 + 4317660098404 = 5167723^2 + 2077898^2 .

It is a cyclic number.

It is not a de Polignac number, because 31023021103133 - 2¹⁰ = 31023021102109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31023021103099 and 31023021103108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023021103153) 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, 245383748 + ... + 245510141.

It is an arithmetic number, because the mean of its divisors is an integer number (7755878015055).

Almost surely, 2^{31023021103133} is an apocalyptic number.

It is an amenable number.

31023021103133 is a deficient number, since it is larger than the sum of its proper divisors (490957087).

31023021103133 is an equidigital number, since it uses as much as digits as its factorization.

31023021103133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490957086.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31023021103133 its reverse (33130112032013), we get a palindrome (64153133135146).

The spelling of 31023021103133 in words is "thirty-one trillion, twenty-three billion, twenty-one million, one hundred three thousand, one hundred thirty-three".