31231123022201 has 8 divisors (see below), whose sum is σ = 31928991522120. Its totient is φ = 30537276819712.

The previous prime is 31231123022119. The next prime is 31231123022243. The reversal of 31231123022201 is 10222032113213.

It can be written as a sum of positive squares in 4 ways, for example, as 10047150236176 + 21183972786025 = 3169724^2 + 4602605^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31231123022201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231129022201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005558656 + ... + 1005589713.

It is an arithmetic number, because the mean of its divisors is an integer number (3991123940265).

Almost surely, 2^{31231123022201} is an apocalyptic number.

It is an amenable number.

31231123022201 is a deficient number, since it is larger than the sum of its proper divisors (697868499919).

31231123022201 is a wasteful number, since it uses less digits than its factorization.

31231123022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011148715.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31231123022201 its reverse (10222032113213), we get a palindrome (41453155135414).

The spelling of 31231123022201 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty-three million, twenty-two thousand, two hundred one".