12121022122021 has 8 divisors (see below), whose sum is σ = 12683254354560. Its totient is φ = 11561725828752.

The previous prime is 12121022121991. The next prime is 12121022122051. The reversal of 12121022122021 is 12022122012121.

It is an interprime number because it is at equal distance from previous prime (12121022121991) and next prime (12121022122051).

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 12121022122021 - 2⁴¹ = 9921998866469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12121022122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121022122051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 733976370 + ... + 733992883.

It is an arithmetic number, because the mean of its divisors is an integer number (1585406794320).

Almost surely, 2^{12121022122021} is an apocalyptic number.

It is an amenable number.

12121022122021 is a deficient number, since it is larger than the sum of its proper divisors (562232232539).

12121022122021 is a wasteful number, since it uses less digits than its factorization.

12121022122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467969635.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12121022122021 its reverse (12022122012121), we get a palindrome (24143144134142).

The spelling of 12121022122021 in words is "twelve trillion, one hundred twenty-one billion, twenty-two million, one hundred twenty-two thousand, twenty-one".