12020121222021 has 48 divisors (see below), whose sum is σ = 19364356447488. Its totient is φ = 7122344054400.

The previous prime is 12020121221993. The next prime is 12020121222037. The reversal of 12020121222021 is 12022212102021.

It is a happy number.

12020121222021 is a `hidden beast` number, since 12 + 0 + 201 + 212 + 220 + 21 = 666.

It is not a de Polignac number, because 12020121222021 - 2²¹ = 12020119124869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12020121221985 and 12020121222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020121220021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3005835 + ... + 5751111.

It is an arithmetic number, because the mean of its divisors is an integer number (403424092656).

Almost surely, 2^{12020121222021} is an apocalyptic number.

12020121222021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12020121222021 is a deficient number, since it is larger than the sum of its proper divisors (7344235225467).

12020121222021 is a wasteful number, since it uses less digits than its factorization.

12020121222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746282 (or 2746279 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12020121222021 its reverse (12022212102021), we get a palindrome (24042333324042).

The spelling of 12020121222021 in words is "twelve trillion, twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty-one".