31221311201 has 8 divisors (see below), whose sum is σ = 32231908608. Its totient is φ = 30210930000.

The previous prime is 31221311183. The next prime is 31221311203. The reversal of 31221311201 is 10211312213.

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 31221311201 - 2²² = 31217116897 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 31221311201.

It is not an unprimeable number, because it can be changed into a prime (31221311203) 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, 270446 + ... + 368216.

It is an arithmetic number, because the mean of its divisors is an integer number (4028988576).

Almost surely, 2^31221311201 is an apocalyptic number.

31221311201 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31221311201 is a deficient number, since it is larger than the sum of its proper divisors (1010597407).

31221311201 is a wasteful number, since it uses less digits than its factorization.

31221311201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108103.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31221311201 its reverse (10211312213), we get a palindrome (41432623414).

The spelling of 31221311201 in words is "thirty-one billion, two hundred twenty-one million, three hundred eleven thousand, two hundred one".