31144003002221 has 16 divisors (see below), whose sum is σ = 31271230267200. Its totient is φ = 31017075068928.

The previous prime is 31144003002209. The next prime is 31144003002271. The reversal of 31144003002221 is 12220030044113.

It is a cyclic number.

It is not a de Polignac number, because 31144003002221 - 2³⁰ = 31142929260397 is a prime.

It is a super-2 number, since 2×31144003002221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144003002271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 680289110 + ... + 680334888.

It is an arithmetic number, because the mean of its divisors is an integer number (1954451891700).

Almost surely, 2^{31144003002221} is an apocalyptic number.

It is an amenable number.

31144003002221 is a deficient number, since it is larger than the sum of its proper divisors (127227264979).

31144003002221 is a wasteful number, since it uses less digits than its factorization.

31144003002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48988.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 31144003002221 its reverse (12220030044113), we get a palindrome (43364033046334).

The spelling of 31144003002221 in words is "thirty-one trillion, one hundred forty-four billion, three million, two thousand, two hundred twenty-one".