31123001233201 has 4 divisors (see below), whose sum is σ = 31123015026804. Its totient is φ = 31122987439600.

The previous prime is 31123001233199. The next prime is 31123001233213. The reversal of 31123001233201 is 10233210032113.

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 2719857341601 + 28403143891600 = 1649199^2 + 5329460^2 .

It is a cyclic number.

It is not a de Polignac number, because 31123001233201 - 2¹ = 31123001233199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31123001230201) 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, 2634070 + ... + 8317711.

It is an arithmetic number, because the mean of its divisors is an integer number (7780753756701).

Almost surely, 2^{31123001233201} is an apocalyptic number.

It is an amenable number.

31123001233201 is a deficient number, since it is larger than the sum of its proper divisors (13793603).

31123001233201 is a wasteful number, since it uses less digits than its factorization.

31123001233201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13793602.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31123001233201 its reverse (10233210032113), we get a palindrome (41356211265314).

The spelling of 31123001233201 in words is "thirty-one trillion, one hundred twenty-three billion, one million, two hundred thirty-three thousand, two hundred one".