31010200121 has 4 divisors (see below), whose sum is σ = 31011454500. Its totient is φ = 31008945744.

The previous prime is 31010200099. The next prime is 31010200153. The reversal of 31010200121 is 12100201013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12100201013 = 73351 ⋅164963.

It can be written as a sum of positive squares in 2 ways, for example, as 732460096 + 30277740025 = 27064^2 + 174005^2 .

It is a cyclic number.

It is not a de Polignac number, because 31010200121 - 2¹⁰ = 31010199097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31010200621) 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, 589346 + ... + 639803.

It is an arithmetic number, because the mean of its divisors is an integer number (7752863625).

Almost surely, 2^31010200121 is an apocalyptic number.

It is an amenable number.

31010200121 is a deficient number, since it is larger than the sum of its proper divisors (1254379).

31010200121 is a wasteful number, since it uses less digits than its factorization.

31010200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254378.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 31010200121 its reverse (12100201013), we get a palindrome (43110401134).

The spelling of 31010200121 in words is "thirty-one billion, ten million, two hundred thousand, one hundred twenty-one".