12011202021 has 16 divisors (see below), whose sum is σ = 19710690944. Its totient is φ = 6335578944.

The previous prime is 12011202019. The next prime is 12011202037. The reversal of 12011202021 is 12020211021.

It is not a de Polignac number, because 12011202021 - 2¹ = 12011202019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12011201988 and 12011202006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011202041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21998266 + ... + 21998811.

It is an arithmetic number, because the mean of its divisors is an integer number (1231918184).

Almost surely, 2^12011202021 is an apocalyptic number.

It is an amenable number.

12011202021 is a deficient number, since it is larger than the sum of its proper divisors (7699488923).

12011202021 is a wasteful number, since it uses less digits than its factorization.

12011202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43997100.

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

Adding to 12011202021 its reverse (12020211021), we get a palindrome (24031413042).

The spelling of 12011202021 in words is "twelve billion, eleven million, two hundred two thousand, twenty-one".