31212221201 has 8 divisors (see below), whose sum is σ = 35674083840. Its totient is φ = 26751102048.

The previous prime is 31212221171. The next prime is 31212221207. The reversal of 31212221201 is 10212221213.

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

It is a cyclic number.

It is not a de Polignac number, because 31212221201 - 2⁶ = 31212221137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31212221201.

It is not an unprimeable number, because it can be changed into a prime (31212221207) 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, 92801 + ... + 266526.

It is an arithmetic number, because the mean of its divisors is an integer number (4459260480).

Almost surely, 2^31212221201 is an apocalyptic number.

It is an amenable number.

31212221201 is a deficient number, since it is larger than the sum of its proper divisors (4461862639).

31212221201 is a wasteful number, since it uses less digits than its factorization.

31212221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371743.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 31212221201 its reverse (10212221213), we get a palindrome (41424442414).

The spelling of 31212221201 in words is "thirty-one billion, two hundred twelve million, two hundred twenty-one thousand, two hundred one".