2121021023 has 8 divisors (see below), whose sum is σ = 2388481536. Its totient is φ = 1866000600.

The previous prime is 2121021013. The next prime is 2121021043. The reversal of 2121021023 is 3201201212.

It is a happy number.

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 2121021023 - 2³⁰ = 1047279199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121020989 and 2121021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121021013) 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, 3109661 + ... + 3110342.

It is an arithmetic number, because the mean of its divisors is an integer number (298560192).

Almost surely, 2^2121021023 is an apocalyptic number.

2121021023 is a deficient number, since it is larger than the sum of its proper divisors (267460513).

2121021023 is a wasteful number, since it uses less digits than its factorization.

2121021023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6220045.

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

The square root of 2121021023 is about 46054.5439994796. The cubic root of 2121021023 is about 1284.8378570768.

Adding to 2121021023 its reverse (3201201212), we get a palindrome (5322222235).

The spelling of 2121021023 in words is "two billion, one hundred twenty-one million, twenty-one thousand, twenty-three".