31251243421201 has 8 divisors (see below), whose sum is σ = 32149996217064. Its totient is φ = 30355339288320.

The previous prime is 31251243421199. The next prime is 31251243421261. The reversal of 31251243421201 is 10212434215213.

It can be written as a sum of positive squares in 4 ways, for example, as 3958727019025 + 27292516402176 = 1989655^2 + 5224224^2 .

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

It is not a de Polignac number, because 31251243421201 - 2¹ = 31251243421199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31251243421261) 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, 712143490 + ... + 712187371.

It is an arithmetic number, because the mean of its divisors is an integer number (4018749527133).

Almost surely, 2^{31251243421201} is an apocalyptic number.

It is an amenable number.

31251243421201 is a deficient number, since it is larger than the sum of its proper divisors (898752795863).

31251243421201 is a wasteful number, since it uses less digits than its factorization.

31251243421201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424331491.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 31251243421201 its reverse (10212434215213), we get a palindrome (41463677636414).

The spelling of 31251243421201 in words is "thirty-one trillion, two hundred fifty-one billion, two hundred forty-three million, four hundred twenty-one thousand, two hundred one".