31030030121 has 8 divisors (see below), whose sum is σ = 31346788104. Its totient is φ = 30713459200.

The previous prime is 31030030061. The next prime is 31030030127. The reversal of 31030030121 is 12103003013.

It can be written as a sum of positive squares in 4 ways, for example, as 26678648896 + 4351381225 = 163336^2 + 65965^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31030030121 - 2¹⁰ = 31030029097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31030030096 and 31030030105.

It is not an unprimeable number, because it can be changed into a prime (31030030127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299705 + ... + 389721.

It is an arithmetic number, because the mean of its divisors is an integer number (3918348513).

Almost surely, 2^31030030121 is an apocalyptic number.

It is an amenable number.

31030030121 is a deficient number, since it is larger than the sum of its proper divisors (316757983).

31030030121 is a wasteful number, since it uses less digits than its factorization.

31030030121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93531.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 31030030121 its reverse (12103003013), we get a palindrome (43133033134).

It can be divided in two parts, 3103003012 and 1, that added together give a palindrome (3103003013).

The spelling of 31030030121 in words is "thirty-one billion, thirty million, thirty thousand, one hundred twenty-one".