31003012120221 has 48 divisors (see below), whose sum is σ = 45959645047680. Its totient is φ = 20134288204800.

The previous prime is 31003012120207. The next prime is 31003012120259. The reversal of 31003012120221 is 12202121030013.

31003012120221 is a `hidden beast` number, since 3 + 100 + 301 + 21 + 20 + 221 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-31003012120221 is a prime.

It is a super-2 number, since 2×31003012120221² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31003012120194 and 31003012120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31003012160221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14090146 + ... + 16141196.

It is an arithmetic number, because the mean of its divisors is an integer number (957492605160).

Almost surely, 2^{31003012120221} is an apocalyptic number.

It is an amenable number.

31003012120221 is a deficient number, since it is larger than the sum of its proper divisors (14956632927459).

31003012120221 is a wasteful number, since it uses less digits than its factorization.

31003012120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051426 (or 2051423 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31003012120221 its reverse (12202121030013), we get a palindrome (43205133150234).

The spelling of 31003012120221 in words is "thirty-one trillion, three billion, twelve million, one hundred twenty thousand, two hundred twenty-one".