12201011122021 has 4 divisors (see below), whose sum is σ = 12621735643500. Its totient is φ = 11780286600544.

The previous prime is 12201011121967. The next prime is 12201011122039. The reversal of 12201011122021 is 12022111010221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10033753112100 + 2167258009921 = 3167610^2 + 1472161^2 .

It is a cyclic number.

It is not a de Polignac number, because 12201011122021 - 2¹³ = 12201011113829 is a prime.

It is a super-2 number, since 2×12201011122021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12201011121986 and 12201011122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201011122621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210362260696 + ... + 210362260753.

It is an arithmetic number, because the mean of its divisors is an integer number (3155433910875).

Almost surely, 2^{12201011122021} is an apocalyptic number.

It is an amenable number.

12201011122021 is a deficient number, since it is larger than the sum of its proper divisors (420724521479).

12201011122021 is an equidigital number, since it uses as much as digits as its factorization.

12201011122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420724521478.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12201011122021 its reverse (12022111010221), we get a palindrome (24223122132242).

The spelling of 12201011122021 in words is "twelve trillion, two hundred one billion, eleven million, one hundred twenty-two thousand, twenty-one".