31003000121 has 8 divisors (see below), whose sum is σ = 32446961664. Its totient is φ = 29567039040.

The previous prime is 31003000117. The next prime is 31003000163. The reversal of 31003000121 is 12100030013.

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 31003000121 - 2² = 31003000117 is a prime.

It is a super-2 number, since 2×31003000121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31003000921) 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, 1992185 + ... + 2007686.

It is an arithmetic number, because the mean of its divisors is an integer number (4055870208).

Almost surely, 2^31003000121 is an apocalyptic number.

It is an amenable number.

31003000121 is a deficient number, since it is larger than the sum of its proper divisors (1443961543).

31003000121 is a wasteful number, since it uses less digits than its factorization.

31003000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000231.

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 31003000121 its reverse (12100030013), we get a palindrome (43103030134).

The spelling of 31003000121 in words is "thirty-one billion, three million, one hundred twenty-one", and thus it is an aban number.