2121012023 has 12 divisors (see below), whose sum is σ = 2350137240. Its totient is φ = 1912319136.

The previous prime is 2121011927. The next prime is 2121012031. The reversal of 2121012023 is 3202101212.

It is a happy number.

It is not a de Polignac number, because 2121012023 - 2¹² = 2121007927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121011989 and 2121012007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121012043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138668 + ... + 153201.

It is an arithmetic number, because the mean of its divisors is an integer number (195844770).

Almost surely, 2^2121012023 is an apocalyptic number.

2121012023 is a deficient number, since it is larger than the sum of its proper divisors (229125217).

2121012023 is a wasteful number, since it uses less digits than its factorization.

2121012023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291938 (or 291925 counting only the distinct ones).

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

The square root of 2121012023 is about 46054.4462891478. The cubic root of 2121012023 is about 1284.8360397827.

Adding to 2121012023 its reverse (3202101212), we get a palindrome (5323113235).

It can be divided in two parts, 21210 and 12023, that added together give a palindrome (33233).

The spelling of 2121012023 in words is "two billion, one hundred twenty-one million, twelve thousand, twenty-three".