12023220021 has 8 divisors (see below), whose sum is σ = 16032367680. Its totient is φ = 8014776192.

The previous prime is 12023220019. The next prime is 12023220023. The reversal of 12023220021 is 12002232021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12023220019) and next prime (12023220023).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12023220021 - 2¹ = 12023220019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12023220023) 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, 134716 + ... + 205413.

It is an arithmetic number, because the mean of its divisors is an integer number (2004045960).

Almost surely, 2^12023220021 is an apocalyptic number.

It is an amenable number.

12023220021 is a deficient number, since it is larger than the sum of its proper divisors (4009147659).

12023220021 is a wasteful number, since it uses less digits than its factorization.

12023220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351915.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 12023220021 its reverse (12002232021), we get a palindrome (24025452042).

It can be divided in two parts, 1202 and 3220021, that added together give a palindrome (3221223).

The spelling of 12023220021 in words is "twelve billion, twenty-three million, two hundred twenty thousand, twenty-one".