31232212132201 has 4 divisors (see below), whose sum is σ = 33069401081172. Its totient is φ = 29395023183232.

The previous prime is 31232212132153. The next prime is 31232212132217. The reversal of 31232212132201 is 10223121223213.

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 17134259816025 + 14097952316176 = 4139355^2 + 3754724^2 .

It is a cyclic number.

It is not a de Polignac number, because 31232212132201 - 2³⁹ = 30682456318313 is a prime.

It is a super-2 number, since 2×31232212132201² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31232212132601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918594474460 + ... + 918594474493.

It is an arithmetic number, because the mean of its divisors is an integer number (8267350270293).

Almost surely, 2^{31232212132201} is an apocalyptic number.

It is an amenable number.

31232212132201 is a deficient number, since it is larger than the sum of its proper divisors (1837188948971).

31232212132201 is a wasteful number, since it uses less digits than its factorization.

31232212132201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837188948970.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31232212132201 its reverse (10223121223213), we get a palindrome (41455333355414).

The spelling of 31232212132201 in words is "thirty-one trillion, two hundred thirty-two billion, two hundred twelve million, one hundred thirty-two thousand, two hundred one".