31000221001 has 16 divisors (see below), whose sum is σ = 33151628160. Its totient is φ = 28902303360.

The previous prime is 31000220983. The next prime is 31000221013. The reversal of 31000221001 is 10012200013.

It is a cyclic number.

It is not a de Polignac number, because 31000221001 - 2⁵ = 31000220969 is a prime.

It is a super-2 number, since 2×31000221001² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31000221071) 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, 730765 + ... + 772021.

It is an arithmetic number, because the mean of its divisors is an integer number (2071976760).

Almost surely, 2^31000221001 is an apocalyptic number.

It is an amenable number.

31000221001 is a deficient number, since it is larger than the sum of its proper divisors (2151407159).

31000221001 is a wasteful number, since it uses less digits than its factorization.

31000221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41904.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 31000221001 its reverse (10012200013), we get a palindrome (41012421014).

The spelling of 31000221001 in words is "thirty-one billion, two hundred twenty-one thousand, one".