31230121221003 has 32 divisors (see below), whose sum is σ = 42846039936000. Its totient is φ = 20221860838400.

The previous prime is 31230121220929. The next prime is 31230121221037. The reversal of 31230121221003 is 30012212103213.

It is a cyclic number.

It is not a de Polignac number, because 31230121221003 - 2⁸ = 31230121220747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31230121221703) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25859683 + ... + 27040403.

It is an arithmetic number, because the mean of its divisors is an integer number (1338938748000).

Almost surely, 2^{31230121221003} is an apocalyptic number.

31230121221003 is a deficient number, since it is larger than the sum of its proper divisors (11615918714997).

31230121221003 is a wasteful number, since it uses less digits than its factorization.

31230121221003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181723.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31230121221003 its reverse (30012212103213), we get a palindrome (61242333324216).

The spelling of 31230121221003 in words is "thirty-one trillion, two hundred thirty billion, one hundred twenty-one million, two hundred twenty-one thousand, three".