2121301031 has 4 divisors (see below), whose sum is σ = 2122854192. Its totient is φ = 2119747872.

The previous prime is 2121300997. The next prime is 2121301033. The reversal of 2121301031 is 1301031212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121301031 - 2¹⁰ = 2121300007 is a prime.

It is a super-2 number, since 2×2121301031² = 8999836128243325922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121300997 and 2121301015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121301033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774530 + ... + 777263.

It is an arithmetic number, because the mean of its divisors is an integer number (530713548).

Almost surely, 2^2121301031 is an apocalyptic number.

2121301031 is a deficient number, since it is larger than the sum of its proper divisors (1553161).

2121301031 is a wasteful number, since it uses less digits than its factorization.

2121301031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553160.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2121301031 is about 46057.5838597728. The cubic root of 2121301031 is about 1284.8943941635.

Adding to 2121301031 its reverse (1301031212), we get a palindrome (3422332243).

It can be divided in two parts, 212 and 1301031, that multiplied together give a palindrome (275818572).

The spelling of 2121301031 in words is "two billion, one hundred twenty-one million, three hundred one thousand, thirty-one".