12022021 has 4 divisors (see below), whose sum is σ = 13114944. Its totient is φ = 10929100.

The previous prime is 12022019. The next prime is 12022027.

12022021 is nontrivially palindromic in base 10.

12022021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12022021 - 2¹ = 12022019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021989 and 12022007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12022027) 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, 546445 + ... + 546466.

It is an arithmetic number, because the mean of its divisors is an integer number (3278736).

Almost surely, 2^12022021 is an apocalyptic number.

12022021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12022021 is a deficient number, since it is larger than the sum of its proper divisors (1092923).

12022021 is a wasteful number, since it uses less digits than its factorization.

12022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092922.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 12022021 is about 3467.2786158600. The cubic root of 12022021 is about 229.0828060029.

It can be divided in two parts, 1202 and 2021, that multiplied together give a palindrome (2429242).

The spelling of 12022021 in words is "twelve million, twenty-two thousand, twenty-one".