12020021121 has 8 divisors (see below), whose sum is σ = 16028265024. Its totient is φ = 8012562320.

The previous prime is 12020021119. The next prime is 12020021131. The reversal of 12020021121 is 12112002021.

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 12020021121 - 2¹ = 12020021119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12020021097 and 12020021106.

It is not an unprimeable number, because it can be changed into a prime (12020021131) 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, 159570 + ... + 222491.

It is an arithmetic number, because the mean of its divisors is an integer number (2003533128).

Almost surely, 2^12020021121 is an apocalyptic number.

It is an amenable number.

12020021121 is a deficient number, since it is larger than the sum of its proper divisors (4008243903).

12020021121 is a wasteful number, since it uses less digits than its factorization.

12020021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392551.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12020021121 its reverse (12112002021), we get a palindrome (24132023142).

The spelling of 12020021121 in words is "twelve billion, twenty million, twenty-one thousand, one hundred twenty-one".