31030013121 has 8 divisors (see below), whose sum is σ = 41394564864. Its totient is φ = 20676068400.

The previous prime is 31030013101. The next prime is 31030013213. The reversal of 31030013121 is 12131003013.

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

It is not a de Polignac number, because 31030013121 - 2¹⁵ = 31029980353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31030013121.

It is not an unprimeable number, because it can be changed into a prime (31030013101) 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, 2644926 + ... + 2656631.

It is an arithmetic number, because the mean of its divisors is an integer number (5174320608).

Almost surely, 2^31030013121 is an apocalyptic number.

It is an amenable number.

31030013121 is a deficient number, since it is larger than the sum of its proper divisors (10364551743).

31030013121 is a wasteful number, since it uses less digits than its factorization.

31030013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303511.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31030013121 its reverse (12131003013), we get a palindrome (43161016134).

The spelling of 31030013121 in words is "thirty-one billion, thirty million, thirteen thousand, one hundred twenty-one".