2121022031 has 4 divisors (see below), whose sum is σ = 2121226200. Its totient is φ = 2120817864.

The previous prime is 2121022021. The next prime is 2121022061. The reversal of 2121022031 is 1302201212.

It is a happy number.

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 2121022031 - 2⁶ = 2121021967 is a prime.

It is a super-2 number, since 2×2121022031² = 8997468911974729922, 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 = 2121021997 and 2121022015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121022021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85616 + ... + 107573.

It is an arithmetic number, because the mean of its divisors is an integer number (530306550).

Almost surely, 2^2121022031 is an apocalyptic number.

2121022031 is a deficient number, since it is larger than the sum of its proper divisors (204169).

2121022031 is a wasteful number, since it uses less digits than its factorization.

2121022031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204168.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2121022031 is about 46054.5549430238. The cubic root of 2121022031 is about 1284.8380606134.

Adding to 2121022031 its reverse (1302201212), we get a palindrome (3423223243).

The spelling of 2121022031 in words is "two billion, one hundred twenty-one million, twenty-two thousand, thirty-one".