31003223101121 has 4 divisors (see below), whose sum is σ = 31004826763092. Its totient is φ = 31001619439152.

The previous prime is 31003223101021. The next prime is 31003223101139. The reversal of 31003223101121 is 12110132230013.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15568264400896 + 15434958700225 = 3945664^2 + 3928735^2 .

It is a cyclic number.

It is not a de Polignac number, because 31003223101121 - 2¹⁰ = 31003223100097 is a prime.

It is a super-2 number, since 2×31003223101121² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31003223101093 and 31003223101102.

It is not an unprimeable number, because it can be changed into a prime (31003223101021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801801986 + ... + 801840651.

It is an arithmetic number, because the mean of its divisors is an integer number (7751206690773).

Almost surely, 2^{31003223101121} is an apocalyptic number.

It is an amenable number.

31003223101121 is a deficient number, since it is larger than the sum of its proper divisors (1603661971).

31003223101121 is a wasteful number, since it uses less digits than its factorization.

31003223101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603661970.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31003223101121 its reverse (12110132230013), we get a palindrome (43113355331134).

The spelling of 31003223101121 in words is "thirty-one trillion, three billion, two hundred twenty-three million, one hundred one thousand, one hundred twenty-one".