31221432201 has 16 divisors (see below), whose sum is σ = 42125460480. Its totient is φ = 20566170240.

The previous prime is 31221432173. The next prime is 31221432233. The reversal of 31221432201 is 10223412213.

It is not a de Polignac number, because 31221432201 - 2⁵ = 31221432169 is a prime.

It is a super-3 number, since 3×31221432201³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (31221432401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353011 + ... + 432503.

It is an arithmetic number, because the mean of its divisors is an integer number (2632841280).

Almost surely, 2^31221432201 is an apocalyptic number.

It is an amenable number.

31221432201 is a deficient number, since it is larger than the sum of its proper divisors (10904028279).

31221432201 is a wasteful number, since it uses less digits than its factorization.

31221432201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81056.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31221432201 its reverse (10223412213), we get a palindrome (41444844414).

The spelling of 31221432201 in words is "thirty-one billion, two hundred twenty-one million, four hundred thirty-two thousand, two hundred one".